Re: This week starting out with a great big load of SUX!
There were some A lenses with chips IIRC, the later A zoom lenses that were sold with the ZX/MZ-M cameras, I believe that the A 35-80 4~5.6 was pretty much the same as the F version electronically without an autofocus motor, the same for the A 80-200 f4.7~5.6. I could be wrong but I seem to reading that information somewhere. The Zeiss ZK lenses were Ka lenses that I believe were chipped as well. If the Tokina was produced after the introduction of Pentax F series lenses it may use the F system of an internal contact and digital communication of some kind with the camera body rather than the simple A contacts of a KA lens. On 7/15/2013 9:13 PM, Gerrit Visser wrote: The circuitry, such as it is which is basically tiny brass balls shorting or not shorting to the frame or one of the other balls, is directly below the rear mounting ring. If you take that off, do it slowly so that you can see which balls and springs go where. It could be something gunked up in there. There is no real circuitry inside the old A lenses AFAIK. (I have had several apart, and successfully reassembled them) Gerrit wiggle the lens in the mount; turn it off dismount remount the lens; turn it off dismount the lens, clean the contacts on the lens body and remount the lens ... When I turn it back on, maybe I'll get the focal length prompt again or maybe I'll get the last aperture I selected. If I *DO* get the aperture, it appears I'm going to get the F-- again after a few shots. It's definitely something going on with the lens. I've tried it with a bunch of other lenses that have the aperture ring an 'A' detent. They all work just fine. I've seen that F-- before with several different lenses and it's always been when I somehow got the lens unlocked from the 'A' detent. As soon as I get the lens back in the 'A' position the problem goes away. I think something inside this lens that has to do with whatever circuit detects whether the lens is mechanically locked into the 'A' position or not is wearing out. On 7/15/2013 4:24 PM, Bob Sullivan wrote: And John, Did you clean the contacts on the camera as well? Regards, Bob S. On Mon, Jul 15, 2013 at 12:40 PM, John johnsess...@yahoo.com wrote: On 7/15/2013 1:03 PM, Zos Xavius wrote: Did you try cleaning the contacts? There isn't an communication between the lens and the camera for an A lens. It just reads the contacts and determines aperture range. Try cleaning them. Yup. That was something I learned from Army radios. Don't know why it stopped working. Don't know why it started working again once I got home. Don't know when it's going to decide to crap out again. But the contacts are clean. I (gently) racked the aperture ring several times from 'A' to 2.8 back again to see if maybe some bit of grunge was keeping it from registering the 'A' position internally. I guess it's time to start looking for a backup/replacement before it fails for good. Looks like the only thing available is going to be either the 28-70 F2.8 SIGMA EX ASPHERICAL (77) or the 24-70 F2.8 SIGMA DG EX ASPHERICAL (82). Anyone have hands on experience comparing either of them with the Tokina ATX-Pro? On Mon, Jul 15, 2013 at 12:59 PM, John johnsess...@yahoo.com wrote: I finally dredge up enough motivation to actually go out and do some photography. Got on site my favorite lens takes a crap on me. My workhorse has been a Tokina ATX-Pro 287 28-70mmf/2.8. I got two frames camera won't fire the shutter. Aperture shows F--. I do everything I can to make sure the lens is properly seated that the aperture ring is latched into the 'A' position ... NO JOY! Nothing I can do will make it show the aperture. I have one other 'A' lens (SMC Pentax-A Macro 1:2.8 100mm) in my bag on site, when I switch to it the aperture works fine. I also try both lenses on my K10D (backup) and get the same results; Tokina F-- Pentax shows the aperture selected with the thumb-wheel. I'm back home I've got a couple of other Pentax auto-focus 'A' lenses to test with. They all show the aperture change with the thumb-wheel. And just to add insult to injury, I give the Tokina one last try now it's showing the aperture again. Meanwhile, every bit of motivation has drained away! -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- There are two kinds of computer users those who've experienced a hard drive failure, and those that will. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: This week starting out with a great big load of SUX!
Definitely sounds like the kind of headache I'd rather pay someone else to deal with. On 7/15/2013 9:13 PM, Gerrit Visser wrote: The circuitry, such as it is which is basically tiny brass balls shorting or not shorting to the frame or one of the other balls, is directly below the rear mounting ring. If you take that off, do it slowly so that you can see which balls and springs go where. It could be something gunked up in there. There is no real circuitry inside the old A lenses AFAIK. (I have had several apart, and successfully reassembled them) Gerrit wiggle the lens in the mount; turn it off dismount remount the lens; turn it off dismount the lens, clean the contacts on the lens body and remount the lens ... When I turn it back on, maybe I'll get the focal length prompt again or maybe I'll get the last aperture I selected. If I *DO* get the aperture, it appears I'm going to get the F-- again after a few shots. It's definitely something going on with the lens. I've tried it with a bunch of other lenses that have the aperture ring an 'A' detent. They all work just fine. I've seen that F-- before with several different lenses and it's always been when I somehow got the lens unlocked from the 'A' detent. As soon as I get the lens back in the 'A' position the problem goes away. I think something inside this lens that has to do with whatever circuit detects whether the lens is mechanically locked into the 'A' position or not is wearing out. On 7/15/2013 4:24 PM, Bob Sullivan wrote: And John, Did you clean the contacts on the camera as well? Regards, Bob S. On Mon, Jul 15, 2013 at 12:40 PM, John johnsess...@yahoo.com wrote: On 7/15/2013 1:03 PM, Zos Xavius wrote: Did you try cleaning the contacts? There isn't an communication between the lens and the camera for an A lens. It just reads the contacts and determines aperture range. Try cleaning them. Yup. That was something I learned from Army radios. Don't know why it stopped working. Don't know why it started working again once I got home. Don't know when it's going to decide to crap out again. But the contacts are clean. I (gently) racked the aperture ring several times from 'A' to 2.8 back again to see if maybe some bit of grunge was keeping it from registering the 'A' position internally. I guess it's time to start looking for a backup/replacement before it fails for good. Looks like the only thing available is going to be either the 28-70 F2.8 SIGMA EX ASPHERICAL (77) or the 24-70 F2.8 SIGMA DG EX ASPHERICAL (82). Anyone have hands on experience comparing either of them with the Tokina ATX-Pro? On Mon, Jul 15, 2013 at 12:59 PM, John johnsess...@yahoo.com wrote: I finally dredge up enough motivation to actually go out and do some photography. Got on site my favorite lens takes a crap on me. My workhorse has been a Tokina ATX-Pro 287 28-70mmf/2.8. I got two frames camera won't fire the shutter. Aperture shows F--. I do everything I can to make sure the lens is properly seated that the aperture ring is latched into the 'A' position ... NO JOY! Nothing I can do will make it show the aperture. I have one other 'A' lens (SMC Pentax-A Macro 1:2.8 100mm) in my bag on site, when I switch to it the aperture works fine. I also try both lenses on my K10D (backup) and get the same results; Tokina F-- Pentax shows the aperture selected with the thumb-wheel. I'm back home I've got a couple of other Pentax auto-focus 'A' lenses to test with. They all show the aperture change with the thumb-wheel. And just to add insult to injury, I give the Tokina one last try now it's showing the aperture again. Meanwhile, every bit of motivation has drained away! -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: This week starting out with a great big load of SUX!
You need the brass balls. On Tue, Jul 16, 2013 at 10:58 AM, John johnsess...@yahoo.com wrote: Definitely sounds like the kind of headache I'd rather pay someone else to deal with. On 7/15/2013 9:13 PM, Gerrit Visser wrote: The circuitry, such as it is which is basically tiny brass balls shorting or not shorting to the frame or one of the other balls, is directly below the rear mounting ring. If you take that off, do it slowly so that you can see which balls and springs go where. It could be something gunked up in there. There is no real circuitry inside the old A lenses AFAIK. (I have had several apart, and successfully reassembled them) Gerrit wiggle the lens in the mount; turn it off dismount remount the lens; turn it off dismount the lens, clean the contacts on the lens body and remount the lens ... When I turn it back on, maybe I'll get the focal length prompt again or maybe I'll get the last aperture I selected. If I *DO* get the aperture, it appears I'm going to get the F-- again after a few shots. It's definitely something going on with the lens. I've tried it with a bunch of other lenses that have the aperture ring an 'A' detent. They all work just fine. I've seen that F-- before with several different lenses and it's always been when I somehow got the lens unlocked from the 'A' detent. As soon as I get the lens back in the 'A' position the problem goes away. I think something inside this lens that has to do with whatever circuit detects whether the lens is mechanically locked into the 'A' position or not is wearing out. On 7/15/2013 4:24 PM, Bob Sullivan wrote: And John, Did you clean the contacts on the camera as well? Regards, Bob S. On Mon, Jul 15, 2013 at 12:40 PM, John johnsess...@yahoo.com wrote: On 7/15/2013 1:03 PM, Zos Xavius wrote: Did you try cleaning the contacts? There isn't an communication between the lens and the camera for an A lens. It just reads the contacts and determines aperture range. Try cleaning them. Yup. That was something I learned from Army radios. Don't know why it stopped working. Don't know why it started working again once I got home. Don't know when it's going to decide to crap out again. But the contacts are clean. I (gently) racked the aperture ring several times from 'A' to 2.8 back again to see if maybe some bit of grunge was keeping it from registering the 'A' position internally. I guess it's time to start looking for a backup/replacement before it fails for good. Looks like the only thing available is going to be either the 28-70 F2.8 SIGMA EX ASPHERICAL (77) or the 24-70 F2.8 SIGMA DG EX ASPHERICAL (82). Anyone have hands on experience comparing either of them with the Tokina ATX-Pro? On Mon, Jul 15, 2013 at 12:59 PM, John johnsess...@yahoo.com wrote: I finally dredge up enough motivation to actually go out and do some photography. Got on site my favorite lens takes a crap on me. My workhorse has been a Tokina ATX-Pro 287 28-70mmf/2.8. I got two frames camera won't fire the shutter. Aperture shows F--. I do everything I can to make sure the lens is properly seated that the aperture ring is latched into the 'A' position ... NO JOY! Nothing I can do will make it show the aperture. I have one other 'A' lens (SMC Pentax-A Macro 1:2.8 100mm) in my bag on site, when I switch to it the aperture works fine. I also try both lenses on my K10D (backup) and get the same results; Tokina F-- Pentax shows the aperture selected with the thumb-wheel. I'm back home I've got a couple of other Pentax auto-focus 'A' lenses to test with. They all show the aperture change with the thumb-wheel. And just to add insult to injury, I give the Tokina one last try now it's showing the aperture again. Meanwhile, every bit of motivation has drained away! -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- -bmw -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: This week starting out with a great big load of SUX!
BIG brass ones I got, but no interest in messing around with little teeny tiny ones. On 7/16/2013 11:05 AM, Bruce Walker wrote: You need the brass balls. On Tue, Jul 16, 2013 at 10:58 AM, John johnsess...@yahoo.com wrote: Definitely sounds like the kind of headache I'd rather pay someone else to deal with. On 7/15/2013 9:13 PM, Gerrit Visser wrote: The circuitry, such as it is which is basically tiny brass balls shorting or not shorting to the frame or one of the other balls, is directly below the rear mounting ring. If you take that off, do it slowly so that you can see which balls and springs go where. It could be something gunked up in there. There is no real circuitry inside the old A lenses AFAIK. (I have had several apart, and successfully reassembled them) Gerrit wiggle the lens in the mount; turn it off dismount remount the lens; turn it off dismount the lens, clean the contacts on the lens body and remount the lens ... When I turn it back on, maybe I'll get the focal length prompt again or maybe I'll get the last aperture I selected. If I *DO* get the aperture, it appears I'm going to get the F-- again after a few shots. It's definitely something going on with the lens. I've tried it with a bunch of other lenses that have the aperture ring an 'A' detent. They all work just fine. I've seen that F-- before with several different lenses and it's always been when I somehow got the lens unlocked from the 'A' detent. As soon as I get the lens back in the 'A' position the problem goes away. I think something inside this lens that has to do with whatever circuit detects whether the lens is mechanically locked into the 'A' position or not is wearing out. On 7/15/2013 4:24 PM, Bob Sullivan wrote: And John, Did you clean the contacts on the camera as well? Regards, Bob S. On Mon, Jul 15, 2013 at 12:40 PM, John johnsess...@yahoo.com wrote: On 7/15/2013 1:03 PM, Zos Xavius wrote: Did you try cleaning the contacts? There isn't an communication between the lens and the camera for an A lens. It just reads the contacts and determines aperture range. Try cleaning them. Yup. That was something I learned from Army radios. Don't know why it stopped working. Don't know why it started working again once I got home. Don't know when it's going to decide to crap out again. But the contacts are clean. I (gently) racked the aperture ring several times from 'A' to 2.8 back again to see if maybe some bit of grunge was keeping it from registering the 'A' position internally. I guess it's time to start looking for a backup/replacement before it fails for good. Looks like the only thing available is going to be either the 28-70 F2.8 SIGMA EX ASPHERICAL (77) or the 24-70 F2.8 SIGMA DG EX ASPHERICAL (82). Anyone have hands on experience comparing either of them with the Tokina ATX-Pro? On Mon, Jul 15, 2013 at 12:59 PM, John johnsess...@yahoo.com wrote: I finally dredge up enough motivation to actually go out and do some photography. Got on site my favorite lens takes a crap on me. My workhorse has been a Tokina ATX-Pro 287 28-70mmf/2.8. I got two frames camera won't fire the shutter. Aperture shows F--. I do everything I can to make sure the lens is properly seated that the aperture ring is latched into the 'A' position ... NO JOY! Nothing I can do will make it show the aperture. I have one other 'A' lens (SMC Pentax-A Macro 1:2.8 100mm) in my bag on site, when I switch to it the aperture works fine. I also try both lenses on my K10D (backup) and get the same results; Tokina F-- Pentax shows the aperture selected with the thumb-wheel. I'm back home I've got a couple of other Pentax auto-focus 'A' lenses to test with. They all show the aperture change with the thumb-wheel. And just to add insult to injury, I give the Tokina one last try now it's showing the aperture again. Meanwhile, every bit of motivation has drained away! -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: This week starting out with a great big load of SUX!
I dunno...I think it's pretty clear that your lens is F--'d. ;) -p On 7/15/2013 7:25 PM, John wrote: Yeah. VERY VERY carefully, holding it over my head with the lens bayonet facing down so nothing could fall inside. I'm getting some kind of intermittent failure mode. I turn it on it prompts for a focal length. I select a focal length press Ok and I get the F-- on the display. I turn it off wiggle the lens in the mount; turn it off dismount remount the lens; turn it off dismount the lens, clean the contacts on the lens body and remount the lens ... When I turn it back on, maybe I'll get the focal length prompt again or maybe I'll get the last aperture I selected. If I *DO* get the aperture, it appears I'm going to get the F-- again after a few shots. It's definitely something going on with the lens. I've tried it with a bunch of other lenses that have the aperture ring an 'A' detent. They all work just fine. I've seen that F-- before with several different lenses and it's always been when I somehow got the lens unlocked from the 'A' detent. As soon as I get the lens back in the 'A' position the problem goes away. I think something inside this lens that has to do with whatever circuit detects whether the lens is mechanically locked into the 'A' position or not is wearing out. On Mon, Jul 15, 2013 at 12:59 PM, John johnsess...@yahoo.com wrote: I finally dredge up enough motivation to actually go out and do some photography. Got on site my favorite lens takes a crap on me. My workhorse has been a Tokina ATX-Pro 287 28-70mmf/2.8. I got two frames camera won't fire the shutter. Aperture shows F--. I do everything I can to make sure the lens is properly seated that the aperture ring is latched into the 'A' position ... NO JOY! Nothing I can do will make it show the aperture. I have one other 'A' lens (SMC Pentax-A Macro 1:2.8 100mm) in my bag on site, when I switch to it the aperture works fine. I also try both lenses on my K10D (backup) and get the same results; Tokina F-- Pentax shows the aperture selected with the thumb-wheel. I'm back home I've got a couple of other Pentax auto-focus 'A' lenses to test with. They all show the aperture change with the thumb-wheel. And just to add insult to injury, I give the Tokina one last try now it's showing the aperture again. Meanwhile, every bit of motivation has drained away! -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- Being old doesn't seem so old now that I'm old. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: This week starting out with a great big load of SUX!
This is the first, and possibly only, dirty joke my Dad ever told his boys: Q: how did orang utans get their name? A: because they've got big brass balls, and when they swing through the trees they go 'ora-a-a-ang! Uta-a-a-ang!' B On 16 Jul 2013, at 16:32, John johnsess...@yahoo.com wrote: BIG brass ones I got, but no interest in messing around with little teeny tiny ones. On 7/16/2013 11:05 AM, Bruce Walker wrote: You need the brass balls. On Tue, Jul 16, 2013 at 10:58 AM, John johnsess...@yahoo.com wrote: Definitely sounds like the kind of headache I'd rather pay someone else to deal with. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: This week starting out with a great big load of SUX!
Try some contact cleaner. Be wary of how it interacts with the paint. That should be pretty easy to fix. On Tue, Jul 16, 2013 at 2:53 PM, Bob W p...@web-options.com wrote: This is the first, and possibly only, dirty joke my Dad ever told his boys: Q: how did orang utans get their name? A: because they've got big brass balls, and when they swing through the trees they go 'ora-a-a-ang! Uta-a-a-ang!' B On 16 Jul 2013, at 16:32, John johnsess...@yahoo.com wrote: BIG brass ones I got, but no interest in messing around with little teeny tiny ones. On 7/16/2013 11:05 AM, Bruce Walker wrote: You need the brass balls. On Tue, Jul 16, 2013 at 10:58 AM, John johnsess...@yahoo.com wrote: Definitely sounds like the kind of headache I'd rather pay someone else to deal with. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: This week starting out with a great big load of SUX!
Long years in the Army convinced me that a pencil eraser is the best non-residue cleaner to use on these kind of external contacts. It's not the camera because I cannot reproduce the symptom with any other lens (i.e. F-- on the display when the lens is locked in the 'A' position. I'm more and more convinced it's some kind of mechanical wear problem in the lens. On 7/16/2013 3:30 PM, Zos Xavius wrote: Try some contact cleaner. Be wary of how it interacts with the paint. That should be pretty easy to fix. On Tue, Jul 16, 2013 at 2:53 PM, Bob W p...@web-options.com wrote: This is the first, and possibly only, dirty joke my Dad ever told his boys: Q: how did orang utans get their name? A: because they've got big brass balls, and when they swing through the trees they go 'ora-a-a-ang! Uta-a-a-ang!' B On 16 Jul 2013, at 16:32, John johnsess...@yahoo.com wrote: BIG brass ones I got, but no interest in messing around with little teeny tiny ones. On 7/16/2013 11:05 AM, Bruce Walker wrote: You need the brass balls. On Tue, Jul 16, 2013 at 10:58 AM, John johnsess...@yahoo.com wrote: Definitely sounds like the kind of headache I'd rather pay someone else to deal with. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
RE: This week starting out with a great big load of SUX!
Can you take a macro shot of the lens' contacts? That might show something.. Gerrit -Original Message- From: PDML [mailto:pdml-boun...@pdml.net] On Behalf Of John Sent: Tuesday, July 16, 2013 4:56 PM To: Pentax-Discuss Mail List Subject: Re: This week starting out with a great big load of SUX! Long years in the Army convinced me that a pencil eraser is the best non-residue cleaner to use on these kind of external contacts. It's not the camera because I cannot reproduce the symptom with any other lens (i.e. F-- on the display when the lens is locked in the 'A' position. I'm more and more convinced it's some kind of mechanical wear problem in the lens. On 7/16/2013 3:30 PM, Zos Xavius wrote: Try some contact cleaner. Be wary of how it interacts with the paint. That should be pretty easy to fix. On Tue, Jul 16, 2013 at 2:53 PM, Bob W p...@web-options.com wrote: This is the first, and possibly only, dirty joke my Dad ever told his boys: Q: how did orang utans get their name? A: because they've got big brass balls, and when they swing through the trees they go 'ora-a-a-ang! Uta-a-a-ang!' B On 16 Jul 2013, at 16:32, John johnsess...@yahoo.com wrote: BIG brass ones I got, but no interest in messing around with little teeny tiny ones. On 7/16/2013 11:05 AM, Bruce Walker wrote: You need the brass balls. On Tue, Jul 16, 2013 at 10:58 AM, John johnsess...@yahoo.com wrote: Definitely sounds like the kind of headache I'd rather pay someone else to deal with. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
This week starting out with a great big load of SUX!
I finally dredge up enough motivation to actually go out and do some photography. Got on site my favorite lens takes a crap on me. My workhorse has been a Tokina ATX-Pro 287 28-70mmf/2.8. I got two frames camera won't fire the shutter. Aperture shows F--. I do everything I can to make sure the lens is properly seated that the aperture ring is latched into the 'A' position ... NO JOY! Nothing I can do will make it show the aperture. I have one other 'A' lens (SMC Pentax-A Macro 1:2.8 100mm) in my bag on site, when I switch to it the aperture works fine. I also try both lenses on my K10D (backup) and get the same results; Tokina F-- Pentax shows the aperture selected with the thumb-wheel. I'm back home I've got a couple of other Pentax auto-focus 'A' lenses to test with. They all show the aperture change with the thumb-wheel. And just to add insult to injury, I give the Tokina one last try now it's showing the aperture again. Meanwhile, every bit of motivation has drained away! -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: This week starting out with a great big load of SUX!
Did you try cleaning the contacts? There isn't an communication between the lens and the camera for an A lens. It just reads the contacts and determines aperture range. Try cleaning them. On Mon, Jul 15, 2013 at 12:59 PM, John johnsess...@yahoo.com wrote: I finally dredge up enough motivation to actually go out and do some photography. Got on site my favorite lens takes a crap on me. My workhorse has been a Tokina ATX-Pro 287 28-70mmf/2.8. I got two frames camera won't fire the shutter. Aperture shows F--. I do everything I can to make sure the lens is properly seated that the aperture ring is latched into the 'A' position ... NO JOY! Nothing I can do will make it show the aperture. I have one other 'A' lens (SMC Pentax-A Macro 1:2.8 100mm) in my bag on site, when I switch to it the aperture works fine. I also try both lenses on my K10D (backup) and get the same results; Tokina F-- Pentax shows the aperture selected with the thumb-wheel. I'm back home I've got a couple of other Pentax auto-focus 'A' lenses to test with. They all show the aperture change with the thumb-wheel. And just to add insult to injury, I give the Tokina one last try now it's showing the aperture again. Meanwhile, every bit of motivation has drained away! -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: This week starting out with a great big load of SUX!
On 7/15/2013 1:03 PM, Zos Xavius wrote: Did you try cleaning the contacts? There isn't an communication between the lens and the camera for an A lens. It just reads the contacts and determines aperture range. Try cleaning them. Yup. That was something I learned from Army radios. Don't know why it stopped working. Don't know why it started working again once I got home. Don't know when it's going to decide to crap out again. But the contacts are clean. I (gently) racked the aperture ring several times from 'A' to 2.8 back again to see if maybe some bit of grunge was keeping it from registering the 'A' position internally. I guess it's time to start looking for a backup/replacement before it fails for good. Looks like the only thing available is going to be either the 28-70 F2.8 SIGMA EX ASPHERICAL (77) or the 24-70 F2.8 SIGMA DG EX ASPHERICAL (82). Anyone have hands on experience comparing either of them with the Tokina ATX-Pro? On Mon, Jul 15, 2013 at 12:59 PM, John johnsess...@yahoo.com wrote: I finally dredge up enough motivation to actually go out and do some photography. Got on site my favorite lens takes a crap on me. My workhorse has been a Tokina ATX-Pro 287 28-70mmf/2.8. I got two frames camera won't fire the shutter. Aperture shows F--. I do everything I can to make sure the lens is properly seated that the aperture ring is latched into the 'A' position ... NO JOY! Nothing I can do will make it show the aperture. I have one other 'A' lens (SMC Pentax-A Macro 1:2.8 100mm) in my bag on site, when I switch to it the aperture works fine. I also try both lenses on my K10D (backup) and get the same results; Tokina F-- Pentax shows the aperture selected with the thumb-wheel. I'm back home I've got a couple of other Pentax auto-focus 'A' lenses to test with. They all show the aperture change with the thumb-wheel. And just to add insult to injury, I give the Tokina one last try now it's showing the aperture again. Meanwhile, every bit of motivation has drained away! -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: This week starting out with a great big load of SUX!
On Mon, Jul 15, 2013 at 01:40:18PM -0400, John wrote: I guess it's time to start looking for a backup/replacement before it fails for good. Looks like the only thing available is going to be either the 28-70 F2.8 SIGMA EX ASPHERICAL (77) or the 24-70 F2.8 SIGMA DG EX ASPHERICAL (82). Anyone have hands on experience comparing either of them with the Tokina ATX-Pro? I'm quite interested in what you learn about those lenses. For photography in the dojo I need a fast zoom in that focal range. I don't have the money for one at the moment, but doesn't seem to always stop me from buying glass. -- Larry Colen l...@red4est.com http://red4est.com/lrc -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: This week starting out with a great big load of SUX!
And John, Did you clean the contacts on the camera as well? Regards, Bob S. On Mon, Jul 15, 2013 at 12:40 PM, John johnsess...@yahoo.com wrote: On 7/15/2013 1:03 PM, Zos Xavius wrote: Did you try cleaning the contacts? There isn't an communication between the lens and the camera for an A lens. It just reads the contacts and determines aperture range. Try cleaning them. Yup. That was something I learned from Army radios. Don't know why it stopped working. Don't know why it started working again once I got home. Don't know when it's going to decide to crap out again. But the contacts are clean. I (gently) racked the aperture ring several times from 'A' to 2.8 back again to see if maybe some bit of grunge was keeping it from registering the 'A' position internally. I guess it's time to start looking for a backup/replacement before it fails for good. Looks like the only thing available is going to be either the 28-70 F2.8 SIGMA EX ASPHERICAL (77) or the 24-70 F2.8 SIGMA DG EX ASPHERICAL (82). Anyone have hands on experience comparing either of them with the Tokina ATX-Pro? On Mon, Jul 15, 2013 at 12:59 PM, John johnsess...@yahoo.com wrote: I finally dredge up enough motivation to actually go out and do some photography. Got on site my favorite lens takes a crap on me. My workhorse has been a Tokina ATX-Pro 287 28-70mmf/2.8. I got two frames camera won't fire the shutter. Aperture shows F--. I do everything I can to make sure the lens is properly seated that the aperture ring is latched into the 'A' position ... NO JOY! Nothing I can do will make it show the aperture. I have one other 'A' lens (SMC Pentax-A Macro 1:2.8 100mm) in my bag on site, when I switch to it the aperture works fine. I also try both lenses on my K10D (backup) and get the same results; Tokina F-- Pentax shows the aperture selected with the thumb-wheel. I'm back home I've got a couple of other Pentax auto-focus 'A' lenses to test with. They all show the aperture change with the thumb-wheel. And just to add insult to injury, I give the Tokina one last try now it's showing the aperture again. Meanwhile, every bit of motivation has drained away! -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: This week starting out with a great big load of SUX!
Yeah. VERY VERY carefully, holding it over my head with the lens bayonet facing down so nothing could fall inside. I'm getting some kind of intermittent failure mode. I turn it on it prompts for a focal length. I select a focal length press Ok and I get the F-- on the display. I turn it off wiggle the lens in the mount; turn it off dismount remount the lens; turn it off dismount the lens, clean the contacts on the lens body and remount the lens ... When I turn it back on, maybe I'll get the focal length prompt again or maybe I'll get the last aperture I selected. If I *DO* get the aperture, it appears I'm going to get the F-- again after a few shots. It's definitely something going on with the lens. I've tried it with a bunch of other lenses that have the aperture ring an 'A' detent. They all work just fine. I've seen that F-- before with several different lenses and it's always been when I somehow got the lens unlocked from the 'A' detent. As soon as I get the lens back in the 'A' position the problem goes away. I think something inside this lens that has to do with whatever circuit detects whether the lens is mechanically locked into the 'A' position or not is wearing out. On 7/15/2013 4:24 PM, Bob Sullivan wrote: And John, Did you clean the contacts on the camera as well? Regards, Bob S. On Mon, Jul 15, 2013 at 12:40 PM, John johnsess...@yahoo.com wrote: On 7/15/2013 1:03 PM, Zos Xavius wrote: Did you try cleaning the contacts? There isn't an communication between the lens and the camera for an A lens. It just reads the contacts and determines aperture range. Try cleaning them. Yup. That was something I learned from Army radios. Don't know why it stopped working. Don't know why it started working again once I got home. Don't know when it's going to decide to crap out again. But the contacts are clean. I (gently) racked the aperture ring several times from 'A' to 2.8 back again to see if maybe some bit of grunge was keeping it from registering the 'A' position internally. I guess it's time to start looking for a backup/replacement before it fails for good. Looks like the only thing available is going to be either the 28-70 F2.8 SIGMA EX ASPHERICAL (77) or the 24-70 F2.8 SIGMA DG EX ASPHERICAL (82). Anyone have hands on experience comparing either of them with the Tokina ATX-Pro? On Mon, Jul 15, 2013 at 12:59 PM, John johnsess...@yahoo.com wrote: I finally dredge up enough motivation to actually go out and do some photography. Got on site my favorite lens takes a crap on me. My workhorse has been a Tokina ATX-Pro 287 28-70mmf/2.8. I got two frames camera won't fire the shutter. Aperture shows F--. I do everything I can to make sure the lens is properly seated that the aperture ring is latched into the 'A' position ... NO JOY! Nothing I can do will make it show the aperture. I have one other 'A' lens (SMC Pentax-A Macro 1:2.8 100mm) in my bag on site, when I switch to it the aperture works fine. I also try both lenses on my K10D (backup) and get the same results; Tokina F-- Pentax shows the aperture selected with the thumb-wheel. I'm back home I've got a couple of other Pentax auto-focus 'A' lenses to test with. They all show the aperture change with the thumb-wheel. And just to add insult to injury, I give the Tokina one last try now it's showing the aperture again. Meanwhile, every bit of motivation has drained away! -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
RE: This week starting out with a great big load of SUX!
The circuitry, such as it is which is basically tiny brass balls shorting or not shorting to the frame or one of the other balls, is directly below the rear mounting ring. If you take that off, do it slowly so that you can see which balls and springs go where. It could be something gunked up in there. There is no real circuitry inside the old A lenses AFAIK. (I have had several apart, and successfully reassembled them) Gerrit wiggle the lens in the mount; turn it off dismount remount the lens; turn it off dismount the lens, clean the contacts on the lens body and remount the lens ... When I turn it back on, maybe I'll get the focal length prompt again or maybe I'll get the last aperture I selected. If I *DO* get the aperture, it appears I'm going to get the F-- again after a few shots. It's definitely something going on with the lens. I've tried it with a bunch of other lenses that have the aperture ring an 'A' detent. They all work just fine. I've seen that F-- before with several different lenses and it's always been when I somehow got the lens unlocked from the 'A' detent. As soon as I get the lens back in the 'A' position the problem goes away. I think something inside this lens that has to do with whatever circuit detects whether the lens is mechanically locked into the 'A' position or not is wearing out. On 7/15/2013 4:24 PM, Bob Sullivan wrote: And John, Did you clean the contacts on the camera as well? Regards, Bob S. On Mon, Jul 15, 2013 at 12:40 PM, John johnsess...@yahoo.com wrote: On 7/15/2013 1:03 PM, Zos Xavius wrote: Did you try cleaning the contacts? There isn't an communication between the lens and the camera for an A lens. It just reads the contacts and determines aperture range. Try cleaning them. Yup. That was something I learned from Army radios. Don't know why it stopped working. Don't know why it started working again once I got home. Don't know when it's going to decide to crap out again. But the contacts are clean. I (gently) racked the aperture ring several times from 'A' to 2.8 back again to see if maybe some bit of grunge was keeping it from registering the 'A' position internally. I guess it's time to start looking for a backup/replacement before it fails for good. Looks like the only thing available is going to be either the 28-70 F2.8 SIGMA EX ASPHERICAL (77) or the 24-70 F2.8 SIGMA DG EX ASPHERICAL (82). Anyone have hands on experience comparing either of them with the Tokina ATX-Pro? On Mon, Jul 15, 2013 at 12:59 PM, John johnsess...@yahoo.com wrote: I finally dredge up enough motivation to actually go out and do some photography. Got on site my favorite lens takes a crap on me. My workhorse has been a Tokina ATX-Pro 287 28-70mmf/2.8. I got two frames camera won't fire the shutter. Aperture shows F--. I do everything I can to make sure the lens is properly seated that the aperture ring is latched into the 'A' position ... NO JOY! Nothing I can do will make it show the aperture. I have one other 'A' lens (SMC Pentax-A Macro 1:2.8 100mm) in my bag on site, when I switch to it the aperture works fine. I also try both lenses on my K10D (backup) and get the same results; Tokina F-- Pentax shows the aperture selected with the thumb-wheel. I'm back home I've got a couple of other Pentax auto-focus 'A' lenses to test with. They all show the aperture change with the thumb-wheel. And just to add insult to injury, I give the Tokina one last try now it's showing the aperture again. Meanwhile, every bit of motivation has drained away! -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
