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From: Dennis Ahern <>
Subject: Re: use and selection of digital cameras
Date: Mon, 3 Sep 2007 13:19:19 +0000 (UTC)
References: <1188660761.115119.182620@y42g2000hsy.googlegroups.com><H-ydnSx2d9aSEEfbnZ2dnUVZ8tChnZ2d@bt.com><fbf6b4$vqs$1@pcls4.std.com><mailman.1709.1188793129.7287.genire@rootsweb.com><q4nnd3h07ncaf491snll0o5ue9ag67dfk2@4ax.com>


Robert G. Eldridge <> wrote:
: On Sun, 02 Sep 2007 21:17:51 -0700, "FRANK GEBHART"
: <> wrote:

:>I've never done it but I'm told that I can usefully enlarge an image from my
:>3.2 megapixel camera to 8 x 10 inches.

: Some basic maths tell me that at 200 DPI an 8 x 10 image needs 3.2
: megapixels so whilst 300 DPI may in theory be better a 200 DPI print
: is still very good.

Back in the latter half of the 6th decade of a previous century I was
employed by a printer of high quality offset lithography. At a time when
the standard for halftone newspaper photographs was 133dpi [dots per inch]
and most good offset printers could produce 200dpi we were producing
300dpi duotones for major art museums. Suffice it to say that for most of
what you would anticipate reproducing, 200dpi is more than adequate.

-dja


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