Ice,
when Rob and I first got into webcams the only 1.25" adaptors available were ex the US, and pricey, well pricey for a couple of Kiwi bludgers. So Rob drew some diagrams, and got a local machinist to turn a few. Ours were from a hard plastic, and coincidently the "front" hole was about 24mm. I got the front opening threaded to accept the raw 24.5mm thread that the Zeiss orthos have (after you remove the trim eye ring), and I simply attach the ortho to the front of the ToUcam (with adaptor of course). The ortho goes into the focuser, and away I go. Perfect.
Need a picture?
Eyepiece adapters are available commercially, so take a peek at one of these.
NO, the ToUcam lens is never back in the ToUcam, it has been lost ages agao.
Gary
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