Saw doruksal's question about resolution and megapixels on another thread and I thought this might help. I hope I understood his question right...I believe he was asking about prints and megapixels on cameras. I got this info from PCPhoto magazine maybe it'll help a bit.... Using 300 dpi as a standard for printing you would need 300 pixels for every inch of output in both vertical and horizontal directions. For a 3X5 inch print you would need an image file with a resolution of 900 X 1500 pixels to produce a photo quality print. Multiplying those two numbers will give you the resolution you would need from a digital camera.... 900 X 1500=1,350,000 pixels or 1.35 megapixel camera. A 5 X 7 print would be 1500 X 2100 image file. An 8 X 10 print you would want a file with a resolution of 2400 X 3000. For 3x5 and 4x6 prints 1 to 2 megapixels are fine, but for bigger prints like 5x7 and 8x10's a 3 or 4 megapixel camera is better. I'm going to admit that I don't understand this myself completely but it makes sense...however and this is what I don't understand.... if for a 3x5 print you need at 1.3 MP camera then for an 8x10 print you would need a 7.2 MP camera, at least that's the way the math adds up. Maybe someone else can explain that part to me.

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