I'm talking now to Starizona. They have identified yet another "gasket" that I am to remove. This one is grey and mounted inside the large retaining ring at the base of the threads. Too fat, they say. They also say now that the spacer of soft felt-like material in the Celstron M42 adapter should have been left in but they are sending me a "thinner" one. Gosh, each part is a moon shot. And, with this gasket removed, the slider drawer is freed.
Just to clarify, 2 "spacing things" had been manufactured too thick. The grey, felt-like material glued into the Celestron M42 adapter, and the gasket embedded at the base of the large retaining ring, needed to be replaced with thinner substitutes.
But I am going ask again about the clear window. They have told me twice now to leave it in.
Now on to the next problems which will no doubt surface tomorrow...I have no guarantees the camera will now correctly focus.
Later: I just asked Starizona AGAIN about the clear window, leave it or remove it. Here is their answer,
2:58 PM (1 minute ago)
On the 8” RASA you leave the window in on the 11’' RASA you remove it.
The gasket on the retaining ring doesn't change spacing of the camera. That's set by the base of the adapter against the scope, the retaining ring simply holds things in place. What it will change is whether the retaining ring conflicts with the drawer.
The camera will always focus. The question is how curved the field will be.
i agree about leaving the clear window in with a 1mm thick additional filter. I'd take it out with a 3mm. 2mm? Flip a coin. <grin>
This is not an easy scope to get working well. I've spent hours on it, and $250 for PreciseParts adapters.
Edited by bobzeq25, 10 January 2020 - 07:40 PM.