I recently bought the canon 16-35mm F4L IS USM on the back of a wave of good reviews. Upon getting the lens in hand I've followed the lens testing advice here http://www.canonrumors.com/tech-articles/how-to-test-a-lens/ which was very useful.
I've been finding the focus on the lens a little off and not owning focal I used the dot tune method to see what was going on at 35mm, 24 mm and 16mm and I'm throwing up a required +1AFMA at 35 mm, a -1/-2 AFMA at 24 mm and a +6 at 16mm.
I've never had an issue of a zoom lens showing different requirements at different focal lengths. What would members of the forum suggest I do?
1) Dial in +4 and see if that works, I know wide angles are less sensitive than a fast teliphoto prime..
2) Buy FoCal to get more data (does foCal alow you to tune the lense at different areas of the zoom range or is that only the sigma dock?
3)Return the lens and ask for a replacement (Amazon purchase). I want to avoid this if possible as this friday I'm going to India then Australia for a few months and really wanted to use the lens on this trip.
Any and all advice welcome.
I've been finding the focus on the lens a little off and not owning focal I used the dot tune method to see what was going on at 35mm, 24 mm and 16mm and I'm throwing up a required +1AFMA at 35 mm, a -1/-2 AFMA at 24 mm and a +6 at 16mm.
I've never had an issue of a zoom lens showing different requirements at different focal lengths. What would members of the forum suggest I do?
1) Dial in +4 and see if that works, I know wide angles are less sensitive than a fast teliphoto prime..
2) Buy FoCal to get more data (does foCal alow you to tune the lense at different areas of the zoom range or is that only the sigma dock?
3)Return the lens and ask for a replacement (Amazon purchase). I want to avoid this if possible as this friday I'm going to India then Australia for a few months and really wanted to use the lens on this trip.
Any and all advice welcome.