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Using lasers to check dome geometry

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#1 nakbrooks



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Posted 19 October 2016 - 09:24 PM

The shutter width on my dome isn't overly wide for my 400mm telescope. I also have a flats screen which is only just big enough.

Temporarily attaching cheap line lasers lets me check I am within the shutter opening at all pointing angles, and also helps me set Park 2 exactly on the flats screen.

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Nigel Brooks
Stratis Observatory, Hautes Pyrénées, France.

#2 w0mbat



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Posted 19 October 2016 - 11:51 PM

Hi Nigel,

As I have a DSLR on my ASA N10 I am able to direct a laser into the viewfinder of the camera. This projects a nice image of the main mirror onto the dome. It works very well even during he day. However I still have not discovered the explanation for my inaccurate slit positioning in some sky areas. Its one of those problems I have spent many many hours on without finding the answer and then moved on to other issues due to frustration!


ASA DDM60Pro, ASA N10 Astrograph, Orion ED102T CF Refractor, Canon 60Da DSLR, Sirius 2.3 Metre Observatory, WIN10 Pro 64bit.

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