Thanks, BL. Very useful tips.
aj, to each his own. For my specific purpose, I need a cheaper full frame body to complement my 5DIII where I cannot take the latter, and where I cannot change lenses.
Also, thanks for sharing the information about shadow noise in the 5D.
I do understand one cannot get everything at once. I have to expect some trade-off for getting a FF camera for so cheap. I just need to make sure the trade-off is in the right areas. The AFMA is a bit of a worry though.
I did not notice a problem with my 2.8 lenses in regards to AFMA. Anything faster than that, prepare to use your eyeballs and a high precision Ec-S screen
There are hardcore supporters of the idea that "full frame is always better. " I do not think so, and choose 70D without hesitation. Weather sealed, AFMA, AF far superior, more images per second, higher resolution, etc... I have not used original 5D, but some friends use and the noise in the shadows is very ugly. Any Rebel model currently has more like colored noise film, while the original 5D has horrible colored spots.
I have not used any rebels, but I don't think i experienced what I would call horrible colored spots in the shadows. I expose everything to the right with the 5D (as with all my canons), so perhaps that is a partial offset?
I do however use the M frequently and its performance does not leave me thinking twice to reach for the 5D, despite the technology gap. Although I will say I prefer the noise pattern of my 5D over the M when ISOs go north of 400.