jan_bremnes Posted December 6, 2003 Share Posted December 6, 2003 Greetings! I've just started with photography. I have a Pentax ME-super with a 50mm f:2 lens, and now want a wide-angle and tele-lens. My budget is quite tight, so i figured I'd see if my dad had some equipment I could use.Rummaging thrugh some boxes in the attic, I found a couple of old Petri-lenses with screw-mount. A 28mm f:2,8 and a 135mm f:2,8 to be exact. These lenses are just want! So my question is: Does anyone know if I can use these lenses on my Pentax with a k-mount adapter? Link to comment Share on other sites More sharing options...
stemked Posted December 6, 2003 Share Posted December 6, 2003 Sounds like it. If these lenses are the 42mm threaded screw mount lenses (I can't imagine they are anything else) you'll need to pick up a $20 Screw lens to K-mount body adaptor. Check the lenses closely for fungus (in the glass). Lenses left in the dark for long periods of time, especially in moist environments, can pick up this problem. The last thing you need to do is contaminate your other lenses. Link to comment Share on other sites More sharing options...
w._au Posted December 7, 2003 Share Posted December 7, 2003 With the K-mount adapter, you will need to use the lens at the stopped-down aperture while taking the photo. The adapter doesn't support the automatic diaphragm operation on the M42 lenses. For me it's a small tradeoff for being able to use my older lenses. Link to comment Share on other sites More sharing options...
ronald_payne1 Posted December 7, 2003 Share Posted December 7, 2003 I noticed earlier today that at: http://www.keh.com/shop/product.cfm?bid=PS&cid=39&sid=newused&crid=6373653 there is an ADAPTER PETRI TO PENTAX SCREW MOUNT (PETRI) Does this mean that the Petri threads are different from the Pentax M42?Regards. Link to comment Share on other sites More sharing options...
w._au Posted December 7, 2003 Share Posted December 7, 2003 No, the earlier Petri SLRs had their own breech-lock mount. Link to comment Share on other sites More sharing options...
jan_bremnes Posted December 8, 2003 Author Share Posted December 8, 2003 Thanks for your help! I'll get my local camera-store to order one for me then... and hope it works. Link to comment Share on other sites More sharing options...
escu Posted December 21, 2003 Share Posted December 21, 2003 Why whon't you buy K-mount lenses on eBay, as today you can get some good glasses for about $20? Link to comment Share on other sites More sharing options...
pancolart Posted May 20, 2008 Share Posted May 20, 2008 I have 4x superb Petri lenses and baught m42 adapter. But the infinity focus is totally lost i can only focus around 40 cm :(. Link to comment Share on other sites More sharing options...
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