Using the example of the Canon 60D with 18 mp sensor and the Canon 6D with 20.2 mp sensor, shooting the same shot with the same lens with each camera, then cropping the full frame shot for a print to show the same area as the APS-C shot, will the image quality be the same? It seems that with a sensor 1.6 times larger but containing only 12% more pixels, the full frame camera would produce an image of lesser quality when the printed image is produced to the same dimensions. Help!

Many thanks for the clear explanation and for the link. I think any commercial printer worth his salt should be able to resize this for me, don't you?

What is the number you should get when you divide by 200 or 300 to get a good or OK print?

I have been trying to have a picture printed on a 3 panel canvas where each panel is 12X18 in. giving a total print area of 18X36 in..
The photo measures 2464X4931pixels and the jpeg. file size is 8.9 mb.
This seems to give 136dpi if each pixel is a dot.
I am being told that the picture should measure 9000X6000 pixels with a dpi of 300 and a file size of no more that 10 mb.

Can someone explain how all these numbers relate and whether my picture can be printed satisfactorily at the size I want? I have had another picture measuring 4975X3315 pixels in a 13.8mb file printed on canvas 30X20 in and it looks beautiful.
This is the file I sent.

I caught this guy staring down his shadow on the dock. Do you think the B&W or original color makes the best pic? I tried to get the shadow as featureless and black as I could in PP.

Young Great Blue Heron

Any tips for photographing air shows, particularly in flight aircraft?

Hi Meredith,
I am trying to do something with layers (making a composite of two photos).
Can you explain how your tutoring by phone works?