Sigma 12-24 on crop

[G-Dubs]

Thinking of getting a Sigma 12-24 for use on my Canon 60D. Any disadvantages to using this or image artefacts as it's designed for full size sensors

 

[G-Dubs]

You don't think 12mm on crop is wide??

OP: There shouldn't be any problems, if anything it should be sharper across the frame because it's not using the edges of the glass. I don't really use 10/11mm on my Canon so 12mm should be more than wide enough. I don't use it for landscapes though, so not sure how useful 10/11mm would be for you.

Cheers, there are a few others I was thinking of, namely the 2 other Sigmas, both of which are 10-20s and one with a fixed f3.5. The other is the Tamron 10-24 which is the cheapest of the lot. Any thoughts???

We use a Sigma 10-20mm on a 60D and the 10mm is wide . No disadvantage really, it's just a 1.7x crop so yours will be an effective 20-40mm.

Many thanks any thoughts on above options? I'm probably going to the bay for them as I can't afford new. The canon and the sigma 12-24 both seem to be going for £400, with both the sigma 10-24 f4.0-5.6 and the Tamron 10-24 f3.5-4.0 going for about £300.

I'm thinking if I can get the sigma 12-24 for about £400 i've got a good deal but don't want to spend more than I have to. as on paper the Tamron looks a better lens