View Full Version : I've made a focus chart to test parfocal lenses.


Bill Kerrigan
October 7th, 2012, 01:48 PM
I’m making a focus chart to check if my lenses are parfocal.
It uses my computer screen and a target taped at 45 degrees.
You can view it here: #13
Lenses (http://fs700user.com/FS700user.com/Lenses.html)

The system works, but I'd like to improve it... so I'm posting on a few forums.
If anyone with graphic skills wants to help... please write.


Bill Kerrigan
bill@kerrigan.ca
http://www.kerrigan.ca