Resumed testing on Dec 12 using a shorter Feathertouch sct adapter. This test is with the CCD plane positioned 5.75 inches from the back of the OTA. (Again, all distances are from the back of the OTA, which is 0.75 inches more than from the Baffle Lock Nut on the OTA. It's just easier to measure since the Baffle Lock Nut edge is covered by standard SCT Plate Adapter.)

Elongation is noticeable, of course.

20101212_Antares-test-5.75in_001-ddp.jpg