The problem with depth of field and hyperfocal calculations is that the calculations (and depth of field markers on the lens) often assume a small print size (~8x10 inches) and a viewer with less than 20/20 vision. For a viewer with 20/20 vision and a print size of 16x24 inches, the depth of field is considerably less.

Here are the results for your parameters as calculated by the Cambridge in Color calculator:

Regards,

Bill

What's missing from the Cambridge calculator is what "circle of confusion" their calculator selects to use for the hyper focal calculations with a 24" print size, 25cm viewing distance and 20/20 vision.

I consider the used parameters not only meaningless, but foolish. I have 24" (long edge) prints on my wall and usually they are viewed by some 10 feet, not 10 inches! If we just change the viewing distance to 1m (3ft), then the hyperfocal distance becomes 13.18ft and we get 6.8' to infinitity in focus even with 20/20 vision.

Hyperfocal calculations are based on the CoC which should be selected based on print size and REASONABLE viewing distances. We cannot control for eyesight so "normal" vision is assumed. A 4"x 6" print would normally beviewed from 10" or more. I am reminded of early ink jet printesr and people screaming "I can see the dots". Well yeah, when viewing a print with a 4x loupe!