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09-11-2010, 08:04 PM   #1
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Using new lenses on an old Program Plus

I recently came into possession of an old Pentax Program Plus camera. It was free with a lens I wanted.

I was wondering if I can safely use my 18-55mm kit lens and my Sigma 30mm f1.4 lenses with this old film camera?

Is there anything I have to be careful of using a DSLR lens with film cameras?

09-11-2010, 08:14 PM - 1 Like   #2
Ole
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You can't really use those lenses on your film camera:

The lenses are designed for the smaller APS-C format (16 x 24mm) so they will not cover the 24 x 36mm film format.

The lenses will fit on the Program Plus and can be used on Program mode (only), but you will get dark corners on the negative since the lenses do not cover the full 24 x 36 format.
09-11-2010, 08:21 PM   #3
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that's too bad, I love my sigma's speed, and was hoping the 18-55mm could be used as a cheap superwide film camera lens.
09-11-2010, 08:34 PM   #4
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With the Program Plus I believe that you are restricted to program mode with lenses that don't have aperture rings, however seeing as the camera has exposure compensation it should be quite usable under most shooting conditions.

The Sigma 30mm will probably vignette somewhat; the kit 18-55 will vignette at anything much wider than 24mm (remember to take the hood off to get a wider view on film). If a lens is vignetting heavily you should be able to see it in the viewfinder.

I have shot with DA lenses on several of my film bodies with good results.

Check out this thread: https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/31629-da-lens-...ts-thread.html

09-12-2010, 10:28 AM   #5
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Your 18-55 will work without vignetting from about 24mm on. I have used my 18-55 on a Super Program. You should be able to use program mode.
09-12-2010, 12:03 PM   #6
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I use my 18-55 on my Program Plus, they are a good match.

Note that this will not yield technically amazing results, but the effect is very pleasing. The corners are quite soft at 18mm and will vignette, but the picture is ALSO super wide and overall I like the pictures that come out of the lens. The camera does a good job of exposing properly in program mode and the FOV is really quite extreme.

If you zoom into the 20's, you can get very nice "normal" wide angle shots with no vignetting. I'm very happy I bought a film body with auto aperture... it really extends Pentax compatibility in a whole new direction.
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