2104_CSE131_Assignment3_0009_Part_1

Working with the DoF calculation for all images I made the following spreadsheet

 

DOF = 2CNU^2/f^2

In Focus = DOF^.5 for 45 degree angle

 

CoF (C) . . . . . . . . . 0.03

Apertures (N) . . . . 1.8 . . . . . . 3.5 . . . . . . 7.1

Distance (U) . . . . . 394

Lens (mm) (f) . . . . 50

 

DOF (mm) . . . . . . 6.71 . . . . . . 13.04 . . . . . . 26.45

@45 degrees . . 9.48 . . . . . . 18.44 . . . . . . . 37.41

. . . . . . . . . . . . 0 - 6/16" . . 0 - 12/16" . . . . 1 - 8/16"

 

The calculated DoF exactly doubles each time, 6/16, 12/16/ 24/16

 

I focused on the 5" line:

At f/3.5 - DoF is calculated at 12/16". The image looks acceptably sharp to me from around 4.75" to 5.5" which is the 3/4" I'd expect. Focus point was aimed at the 5" line.

Done