Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
02-10-2012, 01:18 PM   #1
Site Supporter
Pepe Guitarra's Avatar

Join Date: Nov 2010
Location: California
Photos: Gallery | Albums
Posts: 2,060
How do AUTO Takumar lenses work on a DSLR?

I have three AUTO Takumar lenses and some Takumar preset lenses too. They have the same formula, either the 105/2.8 and the 135/3.5. The AUTO is supposed to be a step forward the preset, and a precursor of the full AUTO diaphram lenses. The AUTO come with a COKING(?) button that when pushed opens wide the diaphram. The way I have being doing it is: I set the aperture manually with the aperture ring, then push the coking button, and shoot. I get nice photos, in fact great. However, two of my AUTO lenses have broken(?) they remain open. Did I do something wrong, or it is just the failure of a spring or so. In any case, is it something that Eric can fix? Also, one of the 135/3.5 AUTO TAK is so AUTO that I have to keep the pin pushed down. I am thinking crazy glue to keep it down. What do you think, your advice is appreciated.
Thanks, Pepe.

02-10-2012, 01:28 PM   #2
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 42,792
You would use them just like normal takumars on a DSLR. I believe they did away with the two aperture rings on auto takumars and instead added a auto/manual diaphragm switch, obviously you will have to keep it on manual on a DSLR since it doesn't have the controls needed to automatically stop the lens down.

Adam
PentaxForums.com Webmaster (Site Usage Guide | Site Help | My Photography)



PentaxForums.com's high server and development costs are user-supported. You can help cover those costs by donating. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

02-10-2012, 02:18 PM - 1 Like   #3
Site Supporter




Join Date: Jun 2011
Location: Texas
Photos: Gallery
Posts: 1,142
There were two versions of "Auto Takumar" lenses: one that was fully auto, like the Super Takumar (I have one on an early SV) that has an auto/manual switch, and the Semi-automatic "Auto Takumar" that has a cocking lever at the base of the lens to re-open the diaphragm. I have one of these on an H1. On this type, the lever opens the diaphragm, and the Screw-Mount body closes the diaphragm by pushing the actuating pin like on the Super Takumar - expect the diaphragm stays closed after taking the picture. These semi-auto lenses have no auto/manual switch, so there is no external way to stop them down after cocking the diaphragm open.
Since the Pentax dSLRs don't have the right mechanism to push in the lens pin, you need to use an AutoTakumar without cocking the diaphragm open, since it would stay open. Just leave the lever uncocked and stop the lens down manually when ready to take the picture - or learn to focus with the lens stopped down.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
aperture, auto, auto takumar lenses, button, camera, lenses, pentax help, photography, takumar
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Why doesn't Auto White Balance work with manual lenses? vonBaloney Pentax DSLR Discussion 16 10-27-2011 03:00 PM
The 55/50mm brothers - Auto-Takumar and Auto Yashinon ducdao Pentax SLR Lens Discussion 7 09-07-2011 01:27 PM
Super/Auto Takumar lenses NRV Shooter Troubleshooting and Beginner Help 16 10-04-2010 11:07 AM
Auto Takumar lenses pdxbmw Pentax SLR Lens Discussion 2 06-15-2009 08:39 PM
Will these lenses work with DSLR? trk105 Troubleshooting and Beginner Help 10 06-14-2009 07:05 PM



All times are GMT -7. The time now is 12:40 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top