>>2707041Ah, it'll surely be fine. I'd only recommend buying the Sigma Art if you can afford it, obviously. (But for Hobby use too.)
>>2707045Can't directly answer this one, but well, my primary, huge problem with the 5D Mark II was its AF coverage.
It is just terrible. See pic related. No, the cross-type isn't a dual cross-type, and yes, the rest are line types and bunched up like this, not even spaced out. Painful to shoot with if you're accustomed to better setups.
Quite a few other features also got better on the 5D Mark III, but this deficit in AF functionality is the biggest reason why I'd actually even rather work with a more modern APS-C (A6000, D7200, whatever) than the 5D Mark II.
[Hell, the APS-C are not even *that* terribly much worse in terms of ISO noise, and quite a bit better at almost everything else...]