Comparable setup moving to Full Frame

I may be able to snatch up a 5DII for about the same price I got my 7D recently. So, that being said, what would be a good replacement for the Sigma 17-50mm? And, is it possible to match the performance? I paid $250 for the Sigma NEW. Or, is it better to just stick with the 7D and Sigma for the price difference? Can't make up my mind. I can probably sell the 7D for the same amount here locally. Decisions....decisions​.

The equivalent FL is 24-70 if you want f2.8 both sigma and canon do them so you pays your money and takes your choice

lvph2 wrote in post #18353320
I may be able to snatch up a 5DII for about the same price I got my 7D recently. So, that being said, what would be a good replacement for the Sigma 17-50mm?

Multiply the crop lens focal lengths by 1.6 to get the equivalents that you would need for full frame. 17x1.6 = 27.2. 50x1.6 = 80. So with a 24-70mm lens, you would gain a bit at the short end but lose a bit at the long end. If you need the long end, there are several good options in the 24-105 range depending on your budget (Canon f/4L V1 for about $400 used, then two others from Canon and one from Sigma, priced between $600 and $1100 new).

lvph2 wrote in post #18353320
And, is it possible to match the performance? [...] Or, is it better to just stick with the 7D and Sigma for the price difference? Can't make up my mind.

That depends on what aspects of "performance" are important to you. The 5Dii has more MP, but the 7D has more AF points and more FPS. That's just the beginning. There are a ton of other differences between them. What kind of shooting do you typically do? What benefit are you hoping to gain from the 5Dii?

Mike

I've had a 5dII in the past, and really loved the low light and portrait performance of it. For the type of shooting I do, the FPS of the 7D is overkill, so I wouldn't miss it. I'm not really worried about the same exact focal lengths. But, the 24-70mm should be fine. I'll keep my 50mm STM and maybe add a 85+mm prime later on. At one point I had a 28mm, 50mm, 85mm and a 135MF. I didn't mind the prime setup at all. It was really fun.

If you like the low-light performance, I'd try hard to swing one of the 24-70/2.8s to really maximize that.

if you're trying to keep price down you could get a tamron 28-75mm f2.8