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Forum: Pentax SLR Lens Discussion 12-06-2017, 04:35 AM  
Full frame (manual focus) lenses on crop sensor camera
Posted By WondringLisa
Replies: 8
Views: 870
Thanks for the replies, clearly things could have been worded clearer when i was told about it lol.
Forum: Pentax SLR Lens Discussion 12-05-2017, 04:04 PM  
Full frame (manual focus) lenses on crop sensor camera
Posted By WondringLisa
Replies: 8
Views: 870
I have a couple of manual focus prime lenses (a Samyang 500mm F6.3 DX mirror lens and an old SMC Pentax-A 50mm F1.7) and a K-S2 body. I have been told you get a longer focal length with a full frame lense on a crop sensor, but not really found any good info on this so far. With my mirror lens I assume i would multiply the 500mm by the crop factor (1.5) and set the focal length to the end number, in this case around 750mm?

Sorry if I sound a bit vague, I'm kind of hazy on this.

Lisa
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