05-01-2012, 11:00 AM
I had a chance to quickly test this one. It is surprisingly NOT impressive at f/4 or 5.6. The corners are just as bad or worse than Canon 17-40 FaiL <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/sad.gif' class='bbc_emoticon' alt='' />. For the price you may as well buy OEM.
16-28mm faired much better in my quick and non-scientific test, probably similar to Canon 16-35mm (v. acceptable to but far from perfect)
Zeiss 21mm is the glass to kill for. Uber sharp from f/2.8 even in the extreme corners.
16-28mm faired much better in my quick and non-scientific test, probably similar to Canon 16-35mm (v. acceptable to but far from perfect)
Zeiss 21mm is the glass to kill for. Uber sharp from f/2.8 even in the extreme corners.