LensTip.com

Lens review

Sigma 85 mm f/1.4 EX DG HSM

20 December 2010
Arkadiusz Olech

7. Coma and astigmatism



Please Support Us

The coronavirus crisis has been adversely affecting many businesses and, sad but true, ours is not an exception. Despite that difficult situation we would like to preserve continuity and high quality of publications available on all our websites. Still, we are now aware it might be impossible without additional financial help. That's why we would like to ask all those who visit, read, and care about Optyczne.pl, LensTip.com i Allbinos.com for support - it's enough you send us a small sum of money via PayPal. If a lot people decide to support our websites we think we'll stand a chance and survive next months without any lasting harm. We count on your support and understanding, stay safe and be healthy.

- - - - - - - - - - - - - - - - - advertisement - - - - - - - - - - - - - - - - -

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

In fast lenses with the focal lengths ranging from 50 to 100 mm the coma is the most frequent problem. The Sigma, tested here, didn’t manage to avoid it either. On the edge of the APS-C/DX sensor the coma is slight but noticeable by f/1.4 and by f/2.0 too. In the full frame corner the coma becomes huge. Here the Sigma fares worse than the Zeiss 1.4/85 and the Nikkor AF-S 1.4/85 but a tad better than the Canon 1.2/85. What’s interesting among the all 85 mm class lenses the coma is corrected the best by the cheapest Samyang.

Sigma 85 mm f/1.4 EX DG HSM - Coma and astigmatism

The astigmatism of the tested lens is low and not bothersome at all because its average value amounted to 5%. No reasons to worry here.