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Comped Inc
Formula relating viewing distance to ppi |
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In a forum post on 3/5/05 at photo.net, ( http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=00BMqZ ) apparently based on experience in the large photo print business, Kelly Flanigan states, "Most eyes consider 2 arc minutes to be great; maybe 1 arc minute for a top gun pilot."
1 degree = 60 arcminutes, therefore 2 arcminutes = 1/30 degree = .0333 degree
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