Adept AdeptSight User Guide - Manual (Page 633)

Resolution Factors
Focal Length
The following formulas are useful for selecting a camera lens. The optimum lens focal length
depends on the desired measurement resolution, the width or height of the camera field of
view, and the distance from the work surface to the camera.
The following figure shows how an image is produced on the imaging element of the camera.
A relationship exists between the camera-to-object distance, the size of the field of view, and
Focal Length
AdeptSight User's Guide, Version 3.2.x, Updated: 8/23/2012
Page 633