Why do some photographers make such a big deal about printing? They usually > seem to imply that the only way to truly evaluate IQ is by printing (and they are > usually a bit snobby about it). Is this just because they are used to the film days or > is there a real technical reason? Granted I don't have a super high end printer, but I > think the colors and IQ of my digital pictures look better on my monitor.
Interesting that not a single response brought up the issue of proper
viewing distance. Here's a good article on how size matters when it comes to
resolution:
http://photo.net/columns/mjohnston/photo-print-size-and-viewing-distance/
and another:
http://www.photokaboom.com/photography/learn/printing/resolution/1_which_resolution_print_size_viewing_distance.htm
though neither considers the relationship of focal length to viewing distance!
Here's a good discussion:
http://www.apug.org/forums/archive/index.php/t-42809.html
"Adams is talking about the viewing distance at which the perspective would look natural"
The real issue comes up with wide angle shots where the impact of
the image is greatest (and the perspective 'natural') when the viewer is located so that the entire field of vision (and more) is filled.
The general rule of thumb is that the viewing distance should be the
focal length of the lens used multiplied by the degree of enlargement.
For example, a print from a FF camera using a lens with a focal length
of 1" and enlarged to 20x30 should be viewed 20" from the print.
I guess you could use a monitor for this, but the resolution of the
monitor is so much lower than the print, you'd probably reject the
result. One could use a big, flat screen TV, but I don't think
we'd enjoy sitting that close.
Last year, one of the museums in Munich made enormous wall
mounted prints of exterior shots of their building taken a hundred years earlier on
glass plates. Some of the images had very strong perspective using
wide angle lenses. It was interesting to be able to immerse oneself
in the image -- as was the 3D effect.
Printing is an old and noble endeavor -- it's part of the craft of image making.
Or just another hurdle in the way of getting your vision in front of other
people's eyes. Showing images on a screen has its advantages,
but no one will ever say "What a great print."