images provided for illustrative purposes only
USAF Resolution R78W Test Chart, Positive Image, Group 0 Element 1 to Group 4 Element 6
USAF Resolution Test Chart, Positive Image, Group 0 Element 1 to Group 4 Element 6
White Glass, 50mm x 50mm x 3mm
USAF Positive, Group 0/1 to Group 4/6
Nextrema White Glass, 50mm x 50mm x 3mm