I agree entirely, great lens. I didn't go for the Tokina because a) 11-16 is hardly a zoom and b) I use this lens for landscapes, so don't need f2.8If you go for the Sigma you won't be disappointed.
tokina > sigma > tamron.
The Tokina 11-16 is very good, but it has some downsides.
1) Tokina still have QC issues like Tamron and sigma.
2) The range is very limiting, lens that goes to 20 or 24mm can be very useful- 15-36mm equivalent is very handy.
3) 2.8 is only useful for indoor use.
If these aren't issue, then it is a great lens
I've been researching these for days and am looking at the Tokina 12-24 at the moment. Well priced and you don't seem to lose much against the 11-16 other than the extra stop and 1mm.
But you gain a more usable everyday lens with the 24mm maximum focal length and it's pretty cheap to be honest and isn't a risk like the sigma.
f2.8 is massivley useful outdoors for landscapes in lower light conditions - to suggest that it is only useful for indoor use is just ridiculous. It is extremely useful for allowing longer expsoures and lower ISO on landscapes etc. Also once you have a f2.8 UWA you very quickly begin to appreciate the utility of having that flexibility indoors too.
Agreed with points 1 and 2 above. But it really depends what other lenses you use in my view. The Tokina is an excellent UWA lens esp at the money. Any QC issues can be rectified by adjustment, repair or replacement as required.
f2.8 is massively useful outdoors for landscapes in lower light conditions - to suggest that it is only useful for indoor use is just ridiculous. It is extremely useful for allowing longer expsoures and lower ISO on landscapes etc. Also once you have a f2.8 UWA you very quickly begin to appreciate the utility of having that flexibility indoors too.
If you have a 17-55 or similar lens (which I believe many people do) then the fact that the Tokina has a limited 11-16 range doesn't impact its usefulness.
But dof would be an issue for landscapes shot wide open surely?
Except, landscape photography means tripod and any benefit of fast glass goes out the window. Although at the wide end even an aperture of 2.8 gives some DoF, you don't want to be shooting a landscape at 2.8 without a specific reason.
Maybe I shouldn't have said outdoors, but for most uses of an UWA a tripod is normally a requirement. The exception would be indoor group shots of people etc where you want a fast shutter speed.