Tokina 11-16 on FF ?

In my view the Tokina 11-16 with the Kenko 1.4x tele should allow for sharp photos past a lens aperture of f/2.8, but I am not a pro.

johny39 wrote in post #16075797
I got 6D with 24-105, i have this Toki for 2 years, love it on Rebel ,i'm just amateur shooting vacation trips and landscapes mostly, but how is working on FF ? should i keep or sell it? Thx.

I have Tokina 12-24 that works on 5D3 from 17.5mm (hood removed).
So I doubt if 11-16 will work w/o sever vignetting..

Rafromak wrote in post #16114950
Didn't want to post these real bad photos, but you asked for them
This morning I stepped outside and snapped a few fast shots just to see how the Kenko tele would work withe the Tokina 11-16 on FF, so I did not worried about composition, horizontal level, and the rest. No PP (sharpening and the rest) done to the photos except for what CS5 does automatically. No tripod used.

11mm at f/2.8

12mm shows easily corrected vignetting

I removed the images in the quote to save space.

Rafromak, thank you for doing this.

It looks like the 11-16 will work with an off brand 1.4X TC. At 11mm needs reasonable correction. From 12mm vignetting is not so bad and I'm sure with many images no vignetting correction will be needed.

So the 11-16 with a 1.4X TC works somewhat as 15-22mm f/4, and it will work pretty good (as far a vignetting goes) as a 17-22mm (if the 15mm vignettes too much for them).

This should let johny39 (an anyone else) know if he wants to keep or get rid of this lens for temporary/continual use on a full frame.

The Tokina makes for a usable 16 prime on the 5D MK III - in lower light some image circle funk can be noticeable at the outside edge of the image circle and if you push shadows it will jump out at you, but in good light or stopped down a little it's not an issue. My experience on my 5D MK II this is more pronounced and makes the combo less desirable (I think the MK III uses a correction profile that the MK II does not), . . extreme corner performance wide open includes softness and CA on par with most fast wides but stopped down I've been impressed and very happy with performance on the MK III. So much in fact that with my 7D long gone, that for my now and then wide angle needs I'm hanging on to it until the mythical 14-24 comes out to finish my 2.8 holy zoom trinity. Would I buy this lens to use on full frame(?) - No! But since it's been in the kit and gets the job done, I'm in no hurry to by a 16-35 or 17-40 (to only need to sell later) as I can handily get by until my dream wide comes along. Yet another reason to love the Tokina 11-16 2.8 besides what a killer it is on a crop! Here's a 5D MK III shot at 16mm, no profile correction @ 5.6

doc.paradox wrote in post #16115591
The Tokina makes for a usable 16 prime on the 5D MK III - in lower light some image circle funk can be noticeable at the outside edge of the image circle and if you push shadows it will jump out at you, but in good light or stopped down a little it's not an issue. My experience on my 5D MK II this is more pronounced and makes the combo less desirable (I think the MK III uses a correction profile that the MK II does not), . . extreme corner performance wide open includes softness and CA on par with most fast wides but stopped down I've been impressed and very happy with performance on the MK III. So much in fact that with my 7D long gone, that for my now and then wide angle needs I'm hanging on to it until the mythical 14-24 comes out to finish my 2.8 holy zoom trinity. Would I buy this lens to use on full frame(?) - No! But since it's been in the kit and gets the job done, I'm in no hurry to by a 16-35 or 17-40 (to only need to sell later) as I can handily get by until my dream wide comes along. Yet another reason to love the Tokina 11-16 2.8 besides what a killer it is on a crop! Here's a 5D MK III shot at 16mm, no profile correction @ 5.6

Very nice!

If I were you I wouldnt do it, The 11-16 is made for crops, but there are ways to get around it like doc.paradox has done

The tokina 11-16mm works well at 15mm & 16mm on my 6D. This is a nice bonus in addition to the full range you get on a crop camera.