I will always use at least one crop. Having FF only would piss me off and make me feel limited in certain ways.
In some cases, I find the thin DOF to be a hinderance... often I need more. Stopping down and cranking ISO is NOT the same... sorry. 1600 on a modern crop like the 7D or even the 40D is better than 6400 on FF. And shooting wide open vs stopped down gives a different quality to bokeh.
The artificial reach is a very welcome thing to me. 200mm on FF is a LOT less reach than on a crop. The difference is HUGE. I like to stay far away from the couple during the ceremony and reception so they don't notice me. At 200mm on FF, you still have to be pretty darn close to get a closeup of the couple sitting at the head table or something. And once you start getting into lenses above 200mm, they become big, heavy, and expensive.
For wedding shooting, FF is not giving any significant advantage on the ultrawide end. There are excellent ultrawide options for crop bodies. In fact, there are MORE crop ultrawide options than there are for FF. I shoot most of my ultrawide shots on my crop as a result. One disadvantage for crops is that there is no 24mm F/1.4 equivalent. But it's not like that is a common lens for wedding photographers to have.
Another advantage to having both formats is that your primes sorta become two primes in one. For example, a 35mm gives a FOV close to a 50mm on crop, as does 24/35, 50/85, 85/135, 135/200.
As long as canon makes prosumer/pro crops, I will use them. I tried shooting FF only and it was frustrating.
dche5390 wrote in post #10383474
I prefer having the same model, if not, they need to be really similar in terms of ergonomics. For example, D700 + D200 (FX + DX), 5DMKII and 5D (FF + FF)
, dual 5Ds. I once entertained a 1DMKIII and 5DMKII but that didn't go well (didn't like 1.3 crop).
That said, I was also happy with a D200 + D90 (DX + DX) at one stage. As long as I have the required lenses, I'm not really phased anymore between FF/crop. I'm kinda over FF despite still sticking to it.
5D and 5D2 are nothing alike in term of interface. Using them side by side is terrible as the button layout is the same, but all the buttons do different things.