Sigma EX and Full Frame - Compatible?

19-12-2011 02:33AM #1

Fairly straight forward question, I'd have thought, but Google refuses to give a straight answer.

Does anyone know if Sigma EX lenses are compatible with full frame cameras? I use a Canon 7D and have Sigma 10-20mm f/4-5.6, 70-200mm f/2.8 and a 30mm f/1.4 (along with two canon lenses).

I know my canon lenses will work on a full frame camera, but I can't figure out if the Sigma lenses will?

I've been considering buying a full frame Canon (5D1) for a while, but whenever I have the money I always realise it's a bit of an investment and I'd rather use one first, then realise that'd be a bit of a tricky one to pull (getting a 5D1 to use) and lose interest in the idea.

So I just thought I'd ask here if anyone would happen to know if EX lenses work on full frame?

Cheers

artyeva · 19-12-2011 04:03AM

as far as i understand is not the ex bit of the sigma lens terminology you need to look at but the DG/DC bit:

DG: Supports full-frame cameras (newer lenses only, implicit on older models)
DC: Supports cropped-frame cameras (lightweight construction, smaller image circle)

also this: http://www.flickr.com/groups/sigma10-20/discuss/72157624644894916/

19-12-2011 05:53AM

Oooh. I completely forgot about that little bit o' terminology. Feel like a prat now :P

Cheers Artyeva

pete4130 · 19-12-2011 07:21AM

The EX series are just their "pro" lenses.

In my experience with EX lenses, regardless of how much they cost me, 50% of them were crap (Sigma 24-70 2.8, Sigma 70-200 2.8). The 18-50 2.8 DC and the 50-150 2.8 DC were ok though, just ok.