Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
03-18-2009, 03:01 PM   #1
Veteran Member
ytterbium's Avatar

Join Date: Jan 2008
Posts: 1,076
DA lens on a plain K-mount film camera

I have a Chinon CE-4 K mount film camera.
I wanted to fool around with DA 18-55 on it.
As i already expected, when mounting it opens up but stops down on DOF preview (and when shooting accordingly).
Is there any way to fool the camera/lens to stay at least wide open when shooting.
(tape down diaphragm release and aperture indicator pins?)
Partially mounting does not help.
What would happen to metering. I guess it is some sort of mechanical aperture readout open aperture metering.
What aperture value does a DA lens mechanically "show" to camera (if any at all)?

Since you can read quite a lot about K mount at here Welcome to Bojidar Dimitrov's Pentax K-Mount Page, i would highly appreciate some practical, real life cases. Have someone actually achieved this, how? How was such combo working (or not working), metering.

Thank you very much.

Last edited by ytterbium; 03-18-2009 at 03:07 PM.
03-18-2009, 03:50 PM   #2
Veteran Member
ftpaddict's Avatar

Join Date: Jan 2008
Location: Yurp
Photos: Gallery
Posts: 4,669
You could try taping the aperture lever, but masking the electronic contacts won't do you any good (or bad, for that matter. The CE-4 does not know "A" contacts).
Since your Chinon will meter according to the lowest aperture value possible, you will have to compensate manually (by 6-7 stops? I don't know what the aperture range of the 18-55 is )

This is what a DA lens communicates to any K-mount camera not supporting Shutter Priority shooting:
"I'm fully stopped down! "

  • 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, da, da lens, film, fool, k-mount, lens, metering, pentax help, photography
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
K mount lens on M42 Camera Legend Pentax Camera and Field Accessories 2 08-24-2010 05:19 PM
DA lens film camera compatibility? q10 Pentax SLR Lens Discussion 11 07-01-2008 12:58 AM
Old M42 camera, changing lens with film on?? barbosas Pentax Film SLR Discussion 5 08-17-2007 01:43 AM
Camera abuse? Flash abuse? Or just plain stupid? SuperJared Flashes, Lighting, and Studio 5 05-07-2007 01:31 AM

All times are GMT -7. The time now is 07:33 AM. | 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]