MakisM1 wrote in post #15946577
Yes! It's a matter of physics... The lens will dump a certain number of lines per mm on the sensor. A sensor that is 1.6 times longer will capture 1.6 times more lines than the crop.
Since you are reviewing the same size photo from either sensor (with pretty much similar number of pixels in the same dimension...) you will get more sharpness from the full frame.
Assuming that your sensor pixel density does not push the resolving power of the lens etc etc.
EDIT: Not that I don't grin like an idiot every time I look at a photo of the EF70-20 MkII taken with my 60D...
For example, photozone.de says 50mm f/1.4 permits a 15MPixel FF camera to capture 3740 line-pairs per frame height while
a 15MPixel APS-C camera only captures 2598 line-pairs per frame height
The large a format size, the more TOTAL RESOLUTION can be achieved, plus the captured image has to be magnified a lesser amount in order to make given frame size, so that the resolution on print is higher with larger formats, too. For example,
We magnify FF by about 8.5x, while we magnify the smaller APS-C by about 13.6x, to make an 8x10 from each.
- FF: 3740/24 = 156 line-pairs per mm on sensor; and 156/8.5 = 18.4 line-pairs per mm on print
- APS-C: 2598/14.9 = 174 line-pairs per mm on sensor; but 174/13.6 = 12.8 line-pairs per mm on print
If course, the underlying assumption of the above comparison is that you FRAME the shot for same content with both FF and APS-C...which means that you stand 1.6x farther away with APS-C camera!