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Latest Review Posted SMC Pentax-DA 645 25mm F4 AL [IF] SDM AW
a very nice lens, really beautiful colours, contrast and superb sharpness. In corners (8% of width or 5cm of 61,5 cm) it is getting soft. I think this is OK for such a wide angle but I know lenses which are better in corners. As normal with wide-angles, there is distorsion. Even CA is good, too. But you see some, if 100% viewed;especially in high-contrast areas. I built a lee-100mm-filter-holder and tested the lens with a nd 1.2 soft filter very close to hood but I had no chance to take pictures without vignetting in corners. If you get the filter close to lense you can minimize them. But only one filter is working quite good. More than one you have strong vignetting. Everything is off superb quality, as expected regarding price...

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