LensTip.com

Lens review

Canon EF 100-300 mm f/4.5-5.6 USM

22 September 2007
Arkadiusz Olech

7. Coma and astigmatism

In this tested lens the coma was controlled in a very good way, which can be observed in the pictures below. The picture of the diode in the corner of the frame is a bit bigger than in the center but its shape is kept round, which is proof of very good optical work.

Canon EF 100-300 mm f/4.5-5.6 USM - Coma and astigmatism


The astigmatism is corrected well, although not superbly. The average difference between vertical and horizontal MTF50 values in the center reached only 6%. It is worth adding that the astigmatism was smaller in the center of the focal length range and bigger at the edges of that range.


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

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