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02-20-2007, 10:18 PM   #1
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Forward lens compatibility

I found some film the other day (not too old), so went out and bought batteries for my two old film cameras - a MZ-30 (~2000) and a P3 (from 1986). I had two lenses for the P3 - both A zoom lenses but (non-Pentax), and an AF zoom for the MZ-30. My lens buying addiction didn't kick in until going digital, so while I know there is backwards compatibility for all Pentax lenses, what about forward compatibility? Will my AF lenses work in manual mode using the aperture ring (non-DA of course) with the old P3? Or can I only use my older manual k-mount lenses? (I don't have any screwmount lenses).

Thanks - if this is a really stupid question - just let me know or point me to an appropriate thread that's already touched on this subject - a quick scan didn't give me any answers.

02-20-2007, 10:38 PM   #2
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AF lenses are perfectly fine on older film bodies so long as they have an aperture ring.

If you don't mind the vignetting, DA lenses will function on some KAF mount film bodies.
02-21-2007, 08:53 AM   #3
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The MZ-30's firmware prevents the use of M and K lenses, sadly. They would be usable on any other film body, including the P3, however. Check out this page for more info: http://mosphotos.com/PentaxLensCompatibility.htm

The only DA prime you can use on film is the 40mm pancake, since it employs the same optical formula as its M-series predecessor. Most DA zooms will work at the long end, but I'd never recommend them.

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02-21-2007, 09:07 AM   #4
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Oh wow. Thats terrible haha. The first in a series of cutbacks. The Crippled KAF. At least we can still have some compatibility today with the stop down technique.

02-21-2007, 10:07 AM   #5
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Hi Betsy, I don't know about the MZ-30, but I'm fairly certain that newer lenses will work with the P3, You will probably get moderate to bad vignetting with DA lenses however. I have a Vivitar V4000s (completely manual body similar to the K1000) that I bought at a garage sale here and I use my FA 50 1.4, my Tamron 90mm 2.8 macro and my Tamron 28-80 3.5 on it for black and white photos with no problems. Of course I have to use the aperture ring and manual focus but that is not a problem.

NaCl(hope that helps)H2O
02-21-2007, 10:03 PM   #6
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Thanks for all the pointers - bummer about the "crippled" mount - but then, I probably won't be using either film body too much. I've been fooling around with no film, and I have to admit that I'm missing the instant preview function : ).
02-22-2007, 08:10 AM   #7
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QuoteOriginally posted by betsypdx Quote
Thanks for all the pointers - bummer about the "crippled" mount - but then, I probably won't be using either film body too much. I've been fooling around with no film, and I have to admit that I'm missing the instant preview function : ).
What I miss is the ability to take the camera home, down load the shots to my PC, and see them immediately!
What I don't miss at all is the expense and pita of getting the roll of film developed.

NaCl(but in a strange way, shooting film again is kinda fun)H2O
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