Digital Photography
Table of Resolutions
The table below will give you an idea of the resolutions required
for a print.
I've based the calculations on a 200dpi image since this will give a defined and sharp print. It is possible to print at lower resolution (150dpi) but pixellation will become aparent.
Print size in Inches |
Pixel dimensions at 200dpi
print quality |
Required camera resoluion
in megapixel
|
6
x 4 8 x 6 10 x 8 16 x 12 |
800
x 1200 1200 x 1600 2000 x 1600 3200 x 2400 |
1 1.9 3.2 7.6 |
As you may have already worked out, the calculation is pretty simple. Decide on the print size (6 x 4) then decide on resolution (200dpi) then simply multiply each side of the print times the resolution (6 x 200 = 1200, 4 x 200 = 800) to get your dimensions in pixels. Multiply the pixel dimensions (1200 x 800) to get your required camera resolution (960000 or .96 megapixel or simply rounded off to 1 megapixel).
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Basics
Table
Of Resolutions
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