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What pixel dimmensions are required for a clear 4x6" print?

Adam Nance , Oct 18, 2004; 12:46 a.m.

Can anyone tell me what pixel dimmensions I'm safe cropping to for clear images that will never be blown up over 4x6"?

The photos were taken at a recent wedding with a D70 at 2000x3000 pixels, and as I'm editing them, there are a number of shots that might really get interesting if I crop dramatically. They'll be printed by a local lab.

Am I safe cropping down to 1000x1500 or 1200x1800 for shots that won't be blown up above 4x6"? Does anyone have a rule of thumb for minimun pixel dimmensions?

Thanks for your help.

-Adam

Responses

Mark Ci , Oct 18, 2004; 01:16 a.m.

I assume you're happy with full resolution (2Kx3K) images at 8x12? It doesn't make any difference if you crop in photoshop or with a pair of scissors, so 1000x1500 will make 4x6's of identical quality.

William Au , Oct 18, 2004; 01:17 a.m.

I think 300dpi is pretty standard, so 1200x1800 would be good. My lab says they can work with 150dpi files, but I've never tried printing a 4x6 at that res.

Kelly Flanigan , Oct 18, 2004; 01:37 a.m.

Our small printer will accept up to 600 ppi; but usually we use 400ppi for mapping; and 300 to 360 for photos; if a 4x6; 5x7; 8x10; etc print.

Adam Nance , Oct 18, 2004; 02:30 a.m.

Mark and William, thank you very much. The logic of your posts is exactly how I came up with the two figures of 1000x1500 and 1200x1800. I appreciate the confirmation!

Best to all, Adam

James Dainis , Oct 18, 2004; 09:54 a.m.

The print size you will get is determined by the image dimensions in pixels divided by the printer setting in pixels per inch.

A 1800 x 1200 image printed at 300 ppi would give you a 6 x 4 inch print.

1800/300 x 1200/300 = 6 x 4 inch.

Scott Eaton , Oct 18, 2004; 10:21 a.m.

I print 4x6's to my Frontier shop all the time. It's 1800x1200 for optimum results off that machine.

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