Crop 50mm equivilent EF-S lens?

Cheers for that...

mwsilver wrote in post #18142421
I've had that same Sigma lens for years and have really enjoyed it, but the design does have some focus issues and it vignettes significantly at f/1.4 and its soft at the edges. The build quality is excellent though. I much prefer my Canon 35mm f/2 IS. The Tstop light transmission of the Sigma is 1.8 to 1.9 depending on the body its mounted on. The Tstop of the Canon is 2.0. So even though the Sigma is technically a whole stop wider than the Canon, the amount of additional light it lets through is almost negligible. The Canon is also much sharper in the center and especially from edge to edge and is a much better lens over all. The Sigma at f/1.4 will provide a shallower DoF even if it doesn't take in any more light than the Canon. I'm not knocking the older Sigma really, but it is easily bested by more current offerings.

I have often thought about selling my 30/1.4 ex or the 35 IS but it kills me to think that I will only be able to get $250 tops for the 30. It would cost around $300 more to buy a new 35 IS. I'll probably do it down the road but not until I have a full frame camera. Hopefully the 6d2 will have the specs I want.

FEChariot wrote in post #18142701
I have often thought about selling my 30/1.4 ex or the 35 IS but it kills me to think that I will only be able to get $250 tops for the 30. It would cost around $300 more to buy a new 35 IS. I'll probably do it down the road but not until I have a full frame camera. Hopefully the 6d2 will have the specs I want.

Believe me, I understand. In the meantime it's not like the Sigma won't get the job done. Many people have been using it happily for years. I've always enjoyed mine and still use it occasionally on my 60D.. It's just that if you can live with f/2 vs f/1.4, the Canon 35 f/2 IS is so much better. And being able to hand hold it at very slow shutter speeds is just the icing on the cake.

mwsilver wrote in post #18142881
Believe me, I understand. In the meantime it's not like the Sigma won't get the job done. Many people have been using it happily for years. I've always enjoyed mine and still use it occasionally on my 60D.. It's just that if you can live with f/2 vs f/1.4, the Canon 35 f/2 IS is so much better. And being able to hand hold it at very slow shutter speeds is just the icing on the cake.

Agreed. 35 F2IS, most don't know how good that lens is until they use one. Its a gem of a lens and IS is a killer. Bang on focus and sharp as tack.