its a simple fact thats not too hard to grasp that the image quality from canons full frame cameras is significantly better than their crop cameras to date especially at higher iso
If this is such a simple fact, then why is it no one ever posts proof? In the 3.5 years since the 7D was released I have yet to see even one test that showed "significantly better" IQ from the 5D2 over the 7D through ISO 800. Even at 1600 and 3200 I would only call the IQ difference "significant" for large prints. (The 5D2 is usable at 6400 where the 7D really isn't, except for small prints or web shots.)
Lots and lots of posts claiming "it's a fact!" and "everybody knows it!"...but no pictures.
I've had both. I've made plenty of prints, including plenty of 16x20's. At low to mid ISO there's no difference that survives post processing.
Thank you. I agree with this. I read review after review telling me to look at the difference in noise (even at low light levels) between the 7D and the 5D2 through ISO 800 and I just don't see a significant difference. 5% tops maybe? Yes, higher ISO's things start to deviate.
Now that we have the FF hyperbole out of the way...for regular professional wedding work I would be torn. Weddings often present terrible light levels where every stop counts. Then again, having one crop and one FF body, and the right lenses, can really expand your range without having to change lenses. (I've shot with crop only and with both.)
I would lean towards one of each...depending on lenses...but I would not fault someone for choosing 2 FF bodies for wedding work. OP is going to have to weigh the non-work advantages (reach; speed) against the work situation (lens collection vs. low light).
Your last point is something I have been 'feeling' but unable to express. I am not a full-time professional. Heck, I am not yet willing to call myself a fully-fledged part-time professional. Therefore, I keep feeling like I may want a high quality crop. I just ordered one from Adorama - Canon Refurb $969 and I am going to give it a good test when it shows up. Since I am not a full-time pro and I am not yet shooting weddings (but aspire to one day), I think I am going to likely end up keeping the 7D, wait for the 5D2 refurbs to drop in price more like the 7D did, and then grab one or even a second 5D3 at that time. If my 5D3 goes out during a shoot, a 7D is far better than the older crops or no camera at all.
Problem now is, I ordered a second 5D2 refurb from Canon as the first one that came had 2,851 actuations on it and looked a little worn. So I will be out shipping on two 5D2's once this is all said and done. Will give both 5D2's and the 7D a very good test using FoCal's multi-point AF test (which reveals AF point consistency and accuracy) and possibly still consider keeping one of the two 5D2's. We'll see. Maybe just rent a 5D2 or 5D3 whenever I have a bigger low-light commitment (i.e. Wedding). My 7D should suffice for outdoor shooting.
My lenses - I own:
24-105L, 35 f/1.4L, 50 f/1.4, 85 f/1.8 and 70-200 f/2.8
I think if I take the money I save from buying a 5D2 and put it into a 16-35 f/2.8 II, I'd have a nice wide angle I could use for the 7D that puts me into the ~24-50mm effective range.
I also have been weighing the cost of a 1.4x II extender - $399 to $499. Half to more than half the way to the $969 refurbished 7D... Rather have the 7D (for now) plus it gives me 1.6x AND AF that still works @ f/2.8 and faster using double cross-type points...
Thanks to everyone.