I've owned a Canon EOS D60, then a 10D and finally I presently own a 20D
With the 10D I had some focusing problems, or at least I thought they were focusing problems....
The problem is that in certain circumstances I still have the same problem with the output images.
Problem is that with the 10D and a canon plastic kit lens, the 75-300, I used to get a "double edge" effect, or "halos", specially whe used at 300 mm. When I upgraded I got a Canon 100-400 IS
L and though that I was going to get rid of the problem, never so far.
Options are: the camera and any long lens behave like this in some circumstances (cloudy days with contrast problems) or in the other hand I am doing something wrong.
Hera are 2 examples I took this weekend in an airshow:
100% crop, equiment mentioned above, ISO 200, 1/1600, f8.0, lens is at 400mm end, Tiffen protection filter, IS
Note the white cross on the tail of the aircraft, see the double edge o border? notice also the horizontal stabilizer, same effect.
Same data as on the previous one. Note the numbers on the tail. It shoud read C15 - 36, well, I read C115 - 316, there are a couple of extra ones there thanks to my "double border" effect (noticeable in other parts of the pic, like the logo below thwe numbers)
Does this happen to any of you 20D/100-400 IS
L users out there?
Am I doing something wrong?
TNX a lot.
[Edited 2005-05-17 00:20:15]