Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
05-29-2010, 07:55 AM   #16
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 15,400
in photo 2 of 3 you can see to the right of the lens contact block the small circuit board that seems to go nowhere. I suspect this is where the contact is made, possibly to the points below it on the part that the flexible pcb is wrapped around.

remember yoou are looking for a way to connect the 3rd contact point to the lens mount only when the lens is in the A position.

05-30-2010, 01:55 AM   #17
Senior Member

Join Date: Mar 2010
Location: Berlin
Posts: 112
You could unscrew the mount on body, put a little piece of alluminium foil over the "A" pin (the recessed one, 3rd pin starting from the red dot) and then screw back the mount on.
This way the pin will be always shorted (as if you have a lens mounted on with the aperture on "A" position) but the camera can still know what lens you've mounted, at least with newer lens.

You could give it a try to see if the only problem lies whitin the malfunctioning "A" position on the lens.

I've done it to try P-TTL and matrix metering on older lenses

  • 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, camera, control, k-mount, lens, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
No aperture control photolady95 Pentax SLR Lens Discussion 14 05-16-2010 08:03 PM
135mm 3.5 with no aperture control tortoise Pentax SLR Lens Discussion 3 02-03-2010 05:11 PM
Voigtlander 40mm - aperture control? herzzreh Pentax SLR Lens Discussion 7 01-08-2010 06:49 AM
K-x with prime -- no aperture control pentaxpup Pentax DSLR Discussion 9 12-15-2009 07:37 PM
M lenses - no aperture control? dugrant153 Pentax SLR Lens Discussion 1 11-20-2007 01:31 AM

All times are GMT -7. The time now is 11:58 PM. | See also:, 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?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]