LensTip.com

Recommended

Lens review

Canon EF 17-40 mm f/4.0L USM

22 September 2007
Print Share
Arkadiusz Olech

7. Coma and astigmatism

The next off axis distortion coma is corrected very well. At all focal lengths the diode point of the picture is only slightly distorted in the corner of the frame, which is not very problematic.

Canon EF 17-40 mm f/4.0L USM - Coma and astigmatism


The situation with astigmatism is similar. The average difference between the parallel and the horizontal resolution values measured in the center reaches 3.5%, which is a very good result.


Please Support Us

If you enjoy our reviews and articles, and you want us to continue our work please, support our website by donating through PayPal. The funds are going to be used for paying our editorial team, renting servers, and equipping our testing studio; only that way we will be able to continue providing you interesting content for free.

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

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



Latest reviews

Latest articles

Most read

Latest owners opinions

Copyrights ©2006-2024 CO-NET Robert Olech.
 Strona wygenerowana w 0.054 sek.
This site is not responsible for any damage that the information on this site may cause to your system. It is illegal to copy or redistribute any information found on this site in any way without the expressed written consent of CO-NET Robert Olech
Wydawc LensTip.com jest firma CO-NET Robert Olech. Adres wydawcy oraz redakcji: ul. wirki i Wigury 11/34 83-000 Pruszcz Gdaski

The LensTip.com website uses cookies which are saved on your computer. We employ that technology for functional, statistical and marketing reasons. Cookies allow us to monitor the users' actions on a given page, target the marketing content with a greater accuracy and generally make the interaction between the website and our Visitors easier and faster e.g. by allowing you to log in automatically. Cookies can also be used by our advertisers and the Google Analytics tool which gathers statistical data. If you visit Optyczne.pl and your browser accepts the cookies we assume that you agree with our policy and have nothing against saving them in the memory of your device. If you find it too intrusive you can always change the settings to block cookies. Go here to find out how to set up your browser in order to accept or block cookies and more.