19
Correcting the Flange Focal Distance
1.
Remove the ZEISS CP.3 from the camera.
2.
Follow the steps of chapter
Detaching a Mount
.
3.
Determine the total thickness of the shims that already lay in the lens groove.
4.
Increase or decrease the total shim thickness according to the tables in the appendix by using a flat-bladed
screwdriver or a pair of tweezers.
Any combination of shims is possible to achieve the required thickness and therefore the desired flange
focal distance. Always use the closest possible combination of shims.
Example:
Using a Compact Prime CP.3 35mm/T2.1 lens with an EF mount, scaled in feet and a test chart at a test
distance of 4 ft, an actual distance of 4 ft 1´ is measured. Due to the table on page 14, you add a silver
shim 0.013mm to the total thickness of the shims.
