M68 SPACER - 0.7mm Eyepiece Calculator This test is rarely provided

This test is rarely provided by any producer and it is a standard for high quality filters

Dimensions (only mount with standard fork) 1350 x 550 x 1350 mm Focuser/DeRotator standard

0 Port provides 5Gbps bandwidth and lets the camera run at 20fps  at full resolution

Female M69x1 thread

a typical quartz can have an error of tens of parts per million (ppm)

M68 SPACER - 0.7mm Eyepiece Calculator This test is rarely providedThis 0. 7mm M68 spacer is a very useful for making up the exact backfocus distance required by correctors. The spacer is made of metal which is much more resistant to deformation than plastic spacers. Specifications Optical length 0. 7 mm SKU AX M68SHIM0. 7