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Lens review

Samyang 8 mm f/3.5 Aspherical IF MC Fish-eye

12 May 2009
Arkadiusz Olech

7. Coma and astigmatism


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Shooting a diode and moving it towards the corner of the frame is very difficult in case of a fisheye so this time, we used the night sky instead. Stars, visible as points, do well for testing optical aberrations . As we can see, coma is not much of a hindrance. It is visible at f/3.5 but becomes marginal as we stop down to f/5.6.

Samyang 8 mm f/3.5 Aspherical IF MC Fish-eye - Coma and astigmatism


The situations is similar when it comes to astigmatism. It is not completely invisible and it gets in our way at maximum aperture but its average level amounting 6.3% is not bothersome.