Alan Johnson
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- Joined
- Nov 16, 2004
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I photographed a test chart using a Canon 50mm f1.8 at f8 lit by off camera flash, at the correct distance (50x focal length).
Film was Ilford Delta 100, developed in Rodinal 1:50 . The chart was at the center of the frame.
A negative of the chart was scanned at 7200 dpi in the Plustek 8100 and as normal, black and white levels set and sharpening applied.
IMO the resolution read off the scan (attachment) is ~80 lppm
This corresponds to 80x2x25.4= 4064 dpi.
This is higher than the more reliable result obtained at scandig.com of 3600 dpi, probably because my reading of 80 is a bit optimistic.
Film was Ilford Delta 100, developed in Rodinal 1:50 . The chart was at the center of the frame.
A negative of the chart was scanned at 7200 dpi in the Plustek 8100 and as normal, black and white levels set and sharpening applied.
IMO the resolution read off the scan (attachment) is ~80 lppm
This corresponds to 80x2x25.4= 4064 dpi.
This is higher than the more reliable result obtained at scandig.com of 3600 dpi, probably because my reading of 80 is a bit optimistic.