nakbrooks Posted October 19, 2016 Report Share Posted October 19, 2016 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. Link to comment Share on other sites More sharing options...
w0mbat Posted October 19, 2016 Report Share Posted October 19, 2016 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! Ian Link to comment Share on other sites More sharing options...
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