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Pentax smc FA 35 mm f/2 AL

20 July 2010
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Arkadiusz Olech

8. Vignetting

Lenses designed to work on full frame with moderate focal lengths should cope well on small sensors in the vignetting category. We should be reminded, though, that practice is often far from theory and the results often don’t look so rosy. Our measurements showed that in the case of the Canon the maximum light fall-off in the frame corners was 28% and in the case of the Nikkor- as much as 33%. How does the Pentax fare?

Pentax smc FA 35 mm f/2 AL - Vignetting


At the maximum relative aperture the vignetting reaches 24% (-0.79 EV) which is the lowest result in this class – the Pentax should be praised for it. By f/2.8 the problem disappears completely because the brightness loss in frame corners is just 9% there.


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This chapter can be summed up very shortly: small can still be mighty…


Pentax smc FA 35 mm f/2 AL - Vignetting



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