I see. Yes, you are right, this M lens works like most other M versions. I actually didn't realize, that some M-lenses are different.
I did look for a K-version as well at ebay - and I found one. But according to the PentaxForums Lens Database, the K-version does suffer more from Chromatic Aberration (purple fringing) - and the K-version is 0,065 kg heavier, and it has a longer minumum focusing distance, 8 m as opposed to just 5 m for the M version. So, I prefere the M-version, I guess. In fact it's not too bulky, as I suspected, since there's no glas in the rear half of the barrel. And 1,22 kg isn't too bad, I think. BTW: I did the test, shown at www.flickr.com again. It still seems that then Pentax is not so sharp at F 5.6. But quite sharp at f8 or above. As opposed to my Sigma DG 135-400mm, which is equally sharp/unsharp at most aperture settings: http://www.flickr.com/photos/bladt/sets/72157625198204652/ Regards Jens Treat others as you would like to be treated yourself. On Oct 20, 2010 02:35 "J.C. O'Connell" <[email protected]> wrote: > What I am trying to confirm is if the M version has > the stop down lever and closes the aperture down > during moment of exposure. The early K400 had no > such lever or action. the aperture just stayed at > whatever setting the aperture ring was set to. > This makes the K version fully manual. > > -- > J.C. O'Connell (mailto:[email protected]) > Join the CD PLAYER & DISC Discussions : > http://tech.groups.yahoo.com/group/cdplayers/ > http://launch.groups.yahoo.com/group/cdsound/ > > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf > Of Jens > Sent: Tuesday, October 19, 2010 3:39 PM > To: Pentax-Discuss Mail List > Subject: Re: RE: Enablement: SMC Pentax-M 1:5.6 400mm > > > > Hello J.C. O'Connell > It's an M lens. Meaning manual setting the aperture - F.5.6- f 45. > It's a > spring aperture, so I still have open aperture fokusing. No > electrical > contacts like an A-lens. Manual focus too. I use it utilizing the > "green > button" for measuring light (no open aperture metering). If I use it > with my > 1.7x AF converter I get 680mm and Auto Fokus. > > I own many M-lenses and a few K-lenses. (M stands for Compact Designs > - > meaning lightweight and rather small). > > Regards > Jens > -- > Treat others as you would like to be treated yourself. > > On Oct 19, 2010 18:18 "J.C. O'Connell" <[email protected]> wrote: > > Is the aperture automatic or manual? > > the old screwmount and early K mounts > > were manual. > > > > -- > > J.C. O'Connell (mailto:[email protected]) > > Join the CD PLAYER & DISC Discussions : > > http://tech.groups.yahoo.com/group/cdplayers/ > > http://launch.groups.yahoo.com/group/cdsound/ > > > > > > -----Original Message----- > > From: [email protected] [mailto:[email protected]] On Behalf > > > > Of Jens > > Sent: Tuesday, October 19, 2010 11:38 AM > > To: Pentax-Discuss Mail List > > Subject: Enablement: SMC Pentax-M 1:5.6 400mm > > > > > > I just got one of these old Pentax-M lenses from Germany/Ebay at a > > resonable price - appr. 380 USD/272 Euro. > > > > It's very nice - and quite close to "like new" - except for the > > leather case. I did some tests agains my "doggy" Sigma DG 135-400mm. > > > > Actually, the > > Sigma seems to be sharper at f. 5.6, but the Pentax 400mm improves > > significantly at f. 11 - f. 16. > > > > I am a bit disappointed with the sharpness fully open. I guess I > > should make some more test in better light, with faster shutter > > speeds. I'll let you > > know. > > > > Se some of the test shots here: > > http://www.flickr.com/photos/bladt/sets/72157625198204652/ > > > > Regards > > Jens > > > > > > > > -- > > Treat others as you would like to be treated yourself. > > > > > > -- > > PDML Pentax-Discuss Mail List > > [email protected] > > 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 > > [email protected] > > 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 > [email protected] > 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 > [email protected] > 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 [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
