Hyperfocal distance and CoC

[bomzi]

I've only recently starting using hyperfocal distance focusing in my work. :banghead:
But better late then never!

When using the Arca Swiss VarioFinder (with an RM3Di and P45+) with the little hyperfocal drum, it gives me the following measurements:

SK 35
5.6 8 11 16
3.0 m 2.7 - 3.3 2.6 - 3.5 2.5 - 3.8 2.3 - 4.3
8.0m 6.3 - 11.2 5.8 - 13.5 5.2 - 17.9 4.5 - ∞

I checked the forum and came across a discussion from a few years ago:
https://www.getdpi.com/forum/medium...cks/29148-circle-confusion-current-mfdbs.html

Reading through the discussion, I settled on .014 as a good number to work with for CoC for my sensor. I plugged this into DOF Master's Depth of Field table and got the following numbers:

5.6 8 11 16
3.0 m 2.5 - 3.7 2.4 - 4.1 2.2 - 4.9 2.0 - 6.6
8.0m 5.3 - 16.5 4.6 - 29.4 3.9 - ∞ 3.3 - ∞

The numbers are clearly different. Am I missing something here?

Thanks,
Randhir

 

[Shashin]

Your number simply could be different because you are using a different CoC than Arca. Why not take an image and see how you feel about the CoC you have chosen. DoF is a perceptual quality in an image.

Zeiss gives the CoC as d/1500, where d is the diagonal of the format. Naturally, you can increase or decrease that depending on your criteria. You should be evaluating DoF in a print, not at 100% monitor view.