Robert,
There are two things I don¡¯t understand about what you say.
1) Do you align the main and finder scope before doing this? Is so, then once an object is centred in the finder it should be centred in the main scope as well.
2) Why do you have to refocus after adjusting the setting circles?
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Hello - I do astrophotography on a Digital Drive G11 - one problem I have had in the past is that if I use the finderscope of my telescope to find a bright star, then centre it in my main telescope, set the setting circles to the star's coordinates, I then have to refocus the main and guider camera, before moving to the position of the object I want to photograph.?
Maybe it is obvious to others but I have now started to use??- you simply point your main telescope in roughly the right direction of the DSO, and take a photograph. Then you upload the photo to??which after a minute or so tells you the exact RA and DEC coordinates of the middle of the photo. You can then set the setting circles to these values and can then quickly move to the DSO coordinates.?
This does depend on you having internet access on your computer when you are observing, but is a neat trick for those G11 owners that don't have Goto.?
My main telescope has a focal length of around 700 mm (or 500 mm with a focal reducer) and when coupled with a ZWO ASI 071 camera, the field of view is about 2 degrees by 1 degree, so the above method should enable you to get the DSO in the field of view of the camera, and you can then use the hand controller to centre it.?
