your plan wont work because if you remove the spring, there is no way for the lens to remain locked as you focus
-- 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 Jerry in Arizona Sent: Sunday, August 08, 2010 8:07 PM To: [email protected] Subject: Re: Using the M42 Adapter? First I want to thank all the members for their very helpful discussion and advice. What a great group. Well today I managed to get the Non-Pentax adapter out of the sacrificial PZ-70 without damaging the camera, especially to Derby Chang who provided the following link. http://www.funadium.com/m42tok.php#umount I now have two adapters, including a Pentax brand adapter. Cuz I am basically a coward I decided to remove the spring lock on both adapters. Tried them both on the PZ-70 and they went on and came off with no problems. I have an M42 Super Takumar 135mm f3.5 lens that I was eager to try out on my K20D. First I tried to install the off brand adapter directly to the lens but then it would not attach to the PZ-70 mount. Need to put the adapter in the camera first. Then used the pentax adapter and the lens attached as it should. Went out on the patio and did some test shots of sets of five (+/- .5) dial set to Av, f8. Downloaded shots to the puter and found that I needed a -.5 correction but I was truly amazed at the quality of the image. I am now convinced I am on the right track. Given that the adapters are relatively cheap I will get i per lens, remove the spring and using a automotive thread locker kinda permanantly attach the adapter to the lens. Will be looking for a 300-400mm lens to go after those migratory birds we will be expecting here in a couple of months. Thanks again to all Jerry <<To: Pentax-Discuss Mail List <[email protected]> Subject: Re: Using the M42 Adapter? Message-ID: <[email protected]> Content-Type: text/plain; charset=ISO-8859-1 On Sun, Aug 8, 2010 at 7:24 PM, Paul Ewins <[email protected]> wrote: > >> Pentax has the manual on-line as a PDF file: >> >> http://www.pentaximaging.com/files/manual/Mount_Adapter_K.pdf >> >> It says there's spring you have to push in with the tip of a ball >>point pen, >>then you just turn it counter-clockwise until it stops & it will come out. > > When it works normally, that is what happens. It should just twist and >click >into place and then when you are done you use the special tool which disengages >the spring and allows you to twist it out again. Except when it goes wrong and >you can't disengage the spring and the adapter is then jammed solid. I have >heard of a few other people (apart from myself and Jerry) that this has happened >to and it is always a third-party adapter that goes wrong. > > Paul And that's one reason why I use my M42 glass on my Minolta kit nearly-exclusively these days. Infinity focus can be an issue, but the adapters are WAY less hassle and much cheaper. Screw the adapter on and use them like any other bayonet lens (and at $8 each, you can afford 1 per lens). Canon and 4/3rds adapters work the same. The Pentax style adapters guarantee infinity focus with Pentax lenses (but may have issues with others, especially Fujinon's) but the adapters are way more hassle to use. -Adam>> -- 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.
