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Pentax smc DA* 55 mm f/1.4 SDM

13 May 2009
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Arkadiusz Olech

8. Vignetting

In this category, at maximum aperture, 1.4/50 lenses mention before, like Sigma, Pentax or Zeiss produced very similar results recording the light falloff in the corners of the frame that totaled 23-25%. Pentax DA* 1.4/55 is designed for small sensor, so it might have some more problems here. And it does, although the result isn’t much worse.

Pentax smc DA* 55 mm f/1.4 SDM - Vignetting


For f/1.4 aperture the vignetting reached the level of almost 30% (-0.66 EV). Fortunately, at f/2.0 the problem vanishes nearly completely (9%).


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Pentax smc DA* 55 mm f/1.4 SDM - Vignetting



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