Thread: M42 and friends
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Old 23-12-2021, 06:45 AM
RyanJones
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RyanJones is offline
 
Join Date: Jun 2018
Location: Melbourne,Australia
Posts: 1,439
Quote:
Originally Posted by Startrek View Post
Ryan,
Stars with a slight diamond shape are usually caused by either a pinched primary mirror ( if it has 4 mounting clips not the usual 3 ) or possible astigmatism in the primary or secondary mirror
If you point to a Star and defocus on live view , is the Star a perfect round donut ??
Also Ive read some processing software like PI can cause stars to be slightly diamond shaped too in one of the tools ??
Cheers
Martin
100% sure it’s not a pinched mirror as the mirror cell I modified leaves my mirror practically floating. As I said before, it’s not in my subs so it’s definitely an artifact that I’m introducing in processing. I’m going to have to go though and work out where I’m doing it. I’ll try a repro over Christmas and I’ll really watch out for it.

Cheers

Ryan
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