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Color calibration images are on another page.
These images are of Valles Baker dirt (De) samples. For each image shown,
there are many others. Images were done at most standard focus positions
(4 to 7 positions get everything in focus). I made color images of
the 16-mm and 11-mm sets. These are in focus at 15-18 mm with
46 microns / pixel and at 10-11 mm with 25 microns/pixel.
Top images: ~3.3 mm / screen inch
Bottom images: ~1.8 mm / screen inch
30 cm deep
40 cm deep
50 cm deep
50 cm deep, revisited
This image has the scoop tilted to see fyrther back. The focus range is
46-64 mm, and there are 122 microns / pixel at 54 mm distance.