Quote:
Originally Posted by renormalised
If you add a guidescope to your main scope, you have to align it. Otherwise what is the point of having the guidescope in the first place. Same with your finder. Take your time to make sure that what you see in both reflects what you can view through your main scope, making sure that what's centred there is in the crosshairs of your finder and centred in your guidescope. Otherwise polar aligning your main scope to take piccies or whatever will be a waste of time.
Do an approximate alignment of your guidescope and finder with your main scope on some terrestrial object at some distance to you....say a light pole a few hundred yards away. Then later on, at night, adjust your alignment using a bright star.
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I just assumed that a guidescope was to make sure the star wasnt moving.... and it wasnt until i did my 3-star alignment, and saw guidescope rings for sale online, that it hit me that there was probably some cone error in relation to my guidescope and mount.
I just wasnt sure if this would actually effect guiding or not, obviously it does. I knew the finder had to be aligned to the main scope, but i had never thought about alignig the guidescope.