How many pixels fit on 5x7 or 8x10 print?

Started Jul 2, 2001 | Discussions thread
Phil
New MemberPosts: 13
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Re: How many pixels fit on 5x7 or 8x10 print?
In reply to Gene, Jul 2, 2001

The upper limit is decided by your printer. a 5x7" print on a 1000 dpi inkjet (purely theoretically) would be 5000x7000 unique pixels/ink dots. It would also be a 35 mp image, total overkill, and would probably bring your computer to a grinding halt!

OPTIMAL resolution is an entirely different thing. For an inkjet printer you will get very little improvement in quality for anything higher than 250 dpi, which would be 1250x1750 pixels for 5x7", or roughly 2.1 mp.

A good image processor (Photoshop, Genuine Fractals, et al) would let you scale this size image up to 8x10" and still work pretty well.

So, 2.1 mp is enough for 5x7", more is better for bigger prints.

Gene wrote:

Just how many pixels can physically fit on a 5x7 or 8x10 print? In
other words, if I purchase the Oly c-2100 with 2.1 pixels versus
say waiting for the 3.1 (if it really is in production) does the
print quality really improve?

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