Just wanting to understand your post a bit more, to help out with your question.
You wrote that you’ve been looking at:
- EF-S 10-18mm f/4.5-5.6 IS STM
- Tokina 11-16 (I dont really get all the different versions...)
- Sigma 10-20 4,5-5,6
- Canon 10-22
- but that you got the old sigma 4,5-5,6 and am not too happy with it....
Firstly, what do you mean by the Sigma lens/es you list? Do you mean the same lens – you maybe want a different copy?
Or do you mean you hope to get the Sigma 10-20 f/3.5?
What was/is it exactly / particularly about the ‘old Sigma f/4.5-5.6’ that you didn’t/don’t like?
I have owned 2 copies of the Sigma 10-20mm f/4-5.6 HSM EX lens – bought when there was not the variety of choice there is today. (There were only 3 UWA lenses for Canon APS-C back then): Canon 10-22mm f/3.5-4.5 USM which was just released and expensive, Tokina AF 12-24mm f/4 AT-X Pro DX (not as wide as I wanted) & Sigma 10-20mm f/4-5.6 (less expensive, better build quality and initial tests showed about just as sharp as the Canon). The Canon’s lens hood really turned me off too (very wide / protruding).
However the first copy of my Sigma 10-20mm f/4-5.6 HSM EX had a decentring issue, so I returned it at the shop for another lens. The 2nd copy was good. It was sharp – at nearly all settings, and was a solid performer. The AF on the Sigma was not quite as good as Canon USM’s (I have a number of Canon USM lenses) – ie the Canon was slightly more consistent & a touch faster, but AF for an UWA is not that critical – actually much of the time I used it as a MF lens, as I prefer most of my UWA photos to have lots of depth of field (I mainly shoot landscape with it). It was sharp and contrasty. So overall I was happy with it- great lens for the price (and my results were consistent with a lot of reviews of it, eg at Photozone).
However some time ago I upgraded to the Sigma 8-16mm, for a number of reasons: The first & main reason is that I wanted a few extra mm on the wide end… and 8mm vs 10mm is quite a difference! The other reason is that the newer lens has slightly better sharpness, noticeable less CA (especially at the edges & corners). Don’t get me wrong, the Sigma 10-20mm f/4-5.6 wasn’t ‘bad’ in these respects– not at all, in fact it’s received lots of happy users. Just the Sigma 8-16mm is a bit superior IQ (and it’s wider). I had both for a while, and am happier with the Sigma 8-16mm overall, hence I sold my Sigma 10-20mm. Only lost about AUD $200 for about 5 years of use – which to me is great value for the many many hours & thousands of ‘keeper photos’ I had from it (I sold it for about $400, bought it for just over $600 back in 2008).
The Sigma 8-16mm won’t allow filter (which is a bit of a shame – but as I don’t do many UWA photos requiring filters, I don’t mind that much)… I use filters on my Canon 15-85mm, Canon 70-300mm L and other prime lenses, which is a different story.
Hope this is helpful.