MTC Photography Posted April 20, 2000 Share Posted April 20, 2000 <p><font size=+2 color="green">Emoscop is convenient for examine the lines per mm of printed pictures in various books.<p> I use an EMO-Optik Seibert Emoskop in microscope mode at 25 x to examine the B&W pictures inseveral books:<p><ul><li>Newspaper (Toronto Star) 3 line pair/mm = 150 dpi<li> Joseph D. Cooper: The MINOX MANUAL : 4 lp/mm = 200 dpi<li> Hubert Heckmann: MINOX Variations in 8x11 : 5 lp/mm = 250 dpi<li> Alfred Stiegliz in APERTURE MASTERS OF PHOTOGRAPHY : 5 lp/mm = 250 dpi<li> Andy Warhol Photography: 6 lp/mm = 300 dpi<li> Lens Work magazine : 7 lp/mm = 350 dpi<li> Some Canada Post stamps: 8 lp/mm = 400 dpi<li> Edward Weston Forms of Passion : 12 lp/mm = 600 dpi</ul><p> In the printed pictures, one lp = one black dot and one white dot = 2 dots.<p> The basic assceptable resolution is 4 lp/mm.<p> 5 lp/mm produces good quality pictures..<p> This is a good guide for enlarging negatives based on resolution of lens, ie, 4 lpmm is acceptable, 5 lpmm is good.</font><hr width =20%>Note: In all the printed pictures I have examined, the grid is not arranged in horizintal/vertical manner( ++) butat 45 degrees ( X ) manner. Link to comment Share on other sites More sharing options...
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