Good evening to all,
Knowing that there's no perfect lens, I am desperate to find an ultra-wide angle or wide angle with a performance excellent or very good in the corners.
Here's what I found with the lenses I had or still have:
(had) 17-40mm L f4.0: Poor in the corners at 24mm and 20mm, but unusable for me becaus it's only f4.0.
(had) 16-35mm L f2.8 mark ii: Very poor in the corners at 24mm and 20mm, at 16mm it was terrible.
(have) 20-35mm L f2.8: Much better than all the previous ones in the corners and at any focal length, but with two probems: the minimum focusing distance is too long, only 50cm; and the lens is very prone to flare.
(had) 24-70mm f2.8: I always found this lens not very sharp at 2.8, and the performance in the corners was not better than 17-40.
Are the 20mm f2.8 or the 24mm f1.4 better? The lens I want doesn't exist? =) I will mostly use it at 24mm or 20mm.
absolutely forget the 20mm
or the 24 2.8 non-IS
You need modern primes or a superduper zoom.
Basically you tried almost everyone but the ones you need to try
24 1.4 II is very good at the extreme edges, extreme corners are not perfect but ok enough (not at f/1.4 though! gotta stop down some)
24 T&S II has good corners
zeiss is pretty decent
24 2.8 IS is apparently sharp there stopped down
17 T&S might not be bad
samayng 14mm is actually pretty sharp stopped down there is seems, VERY wide and good deal of distortion though
the samples from the new 24-70 II look decent, stopped down a bit, other than maybe the extreme corners (but extreme edges appear to be very sharp stopped down a bit it would seem)