pulseimages said:
The same thing. Even I do it when I see a photograph hanging on the wall. I can't tell you how many big printed images I have seen up close on a wall that makes me think who are they kidding with this sub par quality.
The 5Dc is not going to provide a significant IQ boost over the 40D. It will be sharper out of camera (but not after post work), it will yield a bit more detail, and less noise at upper ISOs. But that's it. Nor does it have the pixels for a 30" print of challenging subject matter (i.e. landscape) critically viewed at a close distance. I'm not saying such a print would be bad. But if you're as picky as you claim, you will want more.
I consider Canon's 18 MP crop and 21 MP FF sensors to be 24" print sensors given those conditions. And yes, I do regularly print 20" and 24" from an Epson 3880. They're still good at 30", but at that point you start to cross over into territory where higher resolution sensors (or stitched images) are clearly better.
Again, this is for critically reviewed prints of subject matter with challenging fine detail. If you have less challenging subject matter or viewing conditions, then you can go larger. For example, even the 8 MP generation could produce great 1-2 person portrait prints at 24-30".
If you must have FF, save your pennies and get a current >20 MP FF body. If you're fine with crop, get whatever 18 MP body you can afford. (Bummer being this generation sensor is due for replacement. But it's still quite good.)