« on: February 24, 2014, 11:21:00 AM »
Sabaki....a year ago I was in much the same position and upgraded from the 7D to the 5DIII. This is one of those decisions that I am somewhat conflicted about, but I doubt I will ever go back.
So, if you are happy with a crop sensor or if you can convince yourself to be happy. Do not upgrade. Just be happy. Get something like a used 7D or 70D. There are people taking excellent photos (even pros) working with crop sensor cameras. They really are very very good.
That said, there are several areas of improvement going to FF. The question gets to be do you want/need those areas of improvement. Are your crop sensor camera good enough for you. Because, there is always more money to be spent for what are often marginal improvements in photography....both with lenses, sensors, or formats.
The improvements I've noticed include color rendition, bokeh, contrast, low-iso noise, high iso noise and the general latitude you have to process the photo in post (shooting RAW) are all at least a little bit, better. In short, almost everything is at least a little bit better. The real game changer that opened up for me is low light photography without a flash. I am now routinely taking photos at ISO 2000-3200 before I really tried to limit myself to ISO 400-800 on the 7D. So I am doing a lot more low light indoor photography. As others have noted, I even sometimes get "keepers" all the way up to ISO 12,800 (but ISO 6,400-8,000 is really the typical max).
But this is always about deciding what is "good enough" for you....