I take a lot of specimen/artifact photographs.  In the interest of
science, I always include a scale.  However, in the interest of art,
I place the scale so it can easily be cropped out.  That way, you do
not have to take two photographs--just crop or not to get what you
want.

If you are scanning photos for the web, you can make the choice when
you scan to include or not.

Laurel

Laurel Casjens
Curator of Collections
Utah Museum of Natural History
University of Utah
Salt Lake City, UT 84112

801-581-5578
fax: 801-585-3684
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