Sigma 12

If you're in the market for a near pro-quality ultra wide angle zoom lens, the Sigma 12-24mm EX DG provides a good value. It's a bit on the expensive side, but shouldn't need replacing for quite a few years. This lens has won several awards, and...

I took a series of photos of the great-room in my house using the Sigma 12-24mm lens on an A900

The Sigma AF 12-24mm f/4.5-5.6 EX HSM DG is the most extreme full format ultra-wide zoom lens around and it is still a “mainstream” ultra-wide lens when used on APS-C DSLRs. If you're looking for a future-proof “duo-format” lens in this class - well,...

For the specification an excellent lens. I have got some great landscape shots with it and used it indoors in very cramped condition at my son\'s wedding getting shots that \'ordinary\' wide angle lenses can\'t reach on my Canon 5d Mk2.

It\'s a bit churlish of me to list \'slightly soft corners\' in the list of cons above. After all, this is the world\'s widest angle lens for full frame so it\'s a fantastic achievement by any measure. Image quality really is astoundingly good overall....

Soft in corners at 12mm until f/11-f/16. A little more CA than I had hoped with all that FLD glass. More barrel distortion at 12mm (but easy to correct) than I saw in tests of original version lens (I don't have it). Not as good on full frame as the...

in japan , Canon version just out about 2 weeks a go and I bought it after testing it for a few days at a local big camera shop.

The widest lens for your full frame DSLR without going to the 8mm fisheye (which I also own). Very little distortion and quite simply an amazing lens.

An amazing lens on a FF camera. My copy is very sharp for an ultrawide zoom (some corner softness wideopen like the 17-40L). Build is good, AF fast and colour is very pleasing. I've read lots of bad reports but I'm very pleased with this lens. It also...