Would love PENTAX-A SMC 50mm f1.2 on a full frame!

Started Sep 9, 2013 | Discussions thread
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rossdoyle Regular Member • Posts: 128
Re: Would love PENTAX-A SMC 50mm f1.2 on a full frame!

I am lucky to have a Pentax-A 50 f/1.2. It works wonderfully on K-01 with focus peaking. The K-5 actually meters too dark at f/1.2. By about f/1.6 it meters normally. The K-01 doesn't seem to have this problem. There is only a minor difference in DOF wide open when comparing between it and FA 50mm f/1.4. I think this is due to the microlenses or the CMOS surface electronic layers excluding high angle of incidence light (so the light from the greatest apertures is attenuated).

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