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10-02-2008, 02:02 PM   #1
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K-mount won't mount

I bought a 28mm lens on eBay. The seller says it came from his Pentax K1000 camera and is a K-mount. I cannot mount this lens on my K100D Super or on my K20D. What gives? I thought the current cameras could accomodate any legacy lens. The lens is called Image 28mm F/2.8. On the mount face it says P/K-A R-P/K. On the front face it says IMAGE MC.

10-02-2008, 02:04 PM   #2
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take a picture of the underside.

i have a sneaky suspecion its one of those lenses with the extended aperture lever protector.

easy enough fix, just take it off.
10-02-2008, 02:16 PM   #3
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QuoteOriginally posted by audiobomber Quote
I bought a 28mm lens on eBay. The seller says it came from his Pentax K1000 camera and is a K-mount. I cannot mount this lens on my K100D Super or on my K20D. What gives? I thought the current cameras could accomodate any legacy lens. The lens is called Image 28mm F/2.8. On the mount face it says P/K-A R-P/K. On the front face it says IMAGE MC.
Letter "R" doesn't mean Ricoh ? So it has that extra pin. Take care whan you succed to mount it Pentax K mount - Wikipedia, the free encyclopedia
10-02-2008, 02:28 PM   #4
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QuoteOriginally posted by montecarlo Quote
Letter "R" doesn't mean Ricoh ? So it has that extra pin. Take care whan you succed to mount it Pentax K mount - Wikipedia, the free encyclopedia
Yes, the base cap says Ricoh. I guess I was lucky I didn't succeed in mounting it. Thanks for the link.

10-02-2008, 03:39 PM   #5
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QuoteOriginally posted by Gooshin Quote
take a picture of the underside.

i have a sneaky suspecion its one of those lenses with the extended aperture lever protector.

easy enough fix, just take it off.
It looks like this. It has the extra pin, but I think what's keeping it from mounting is the very large black flange.



There's a solution here, but I'm not sure I want to bother since I could just send the lens back. http://www.robertstech.com/flange.htm


Last edited by audiobomber; 10-02-2008 at 04:07 PM.
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