Pentax-DA 560mm F5.6 ED AW

Started Mar 28, 2013 | Discussions thread
lpammann
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Re: Pentax-DA 560mm F5.6 ED AW
In reply to brandrx, Mar 28, 2013

I haven't looked through everything yet, but I did look at the cactus shots that are part of the sharpness section. What I saw with the f/5.6 image was that it was slightly over-exposed compared to the f/8 shot and so there is some loss of color contrast in the cactus at f/5.6. If I had shot that image, I would have lowered the exposure somewhat during raw conversion and then finished with high pixel radius USM (radius=50, amount=12, threshold=0). Doing only USM to the jpeg gets it very close to the f/8 image.

LPA

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Pentax K-5 Pentax K-3 Pentax smc DA* 300mm F4.0 ED (IF) SDM Pentax smc FA 31mm F1.8 AL Limited +1 more
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