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Starman1
Vendor - Scope City
Reged: 06/24/03
Posts: 10920
Loc: Los Angeles
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Re: Orion MCT question
05/02/05 02:54 PM
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Stephane,
The light area in your photograph, and the black image of the secondary, are both elliptical. Yet the reflection (faint) from the baffle and visual back are round.
this implies that both the primary and secondary mirrors are tilted (one perhaps to compensate for the other).
Does your scope exhibit astigmatism when focusing (star goes from oval just outside of focus to oval in a 90 degree direction just inside focus)? If so, your scope is out of collimation and needs adjusting.
This site can help: here.
And the top file on this site is directly applicable:
here.
These will help a lot.
--------------------
Don Pensack
12.5" Truss Dob, 5" Maksutov
Sustaining Lifetime IDA member, TeleVue junkie
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