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Old 23-04-2019, 08:40 AM
xelasnave's Avatar
xelasnave
Gravity does not Suck

xelasnave is offline
 
Join Date: Mar 2005
Location: Tabulam
Posts: 16,866
Welcome Glenn nice to have you aboard.

When you turn it around and with the mount not tracking ie switched off and the scope pointing in exactly the same direction as the axis..the scope should be pointing at the CSP at that point you could take a long exposure say 10 minutes with the gain set low and the stars will trail showing little arcs and you will see that they all have a common center which is the CSP and that center should be the center of your field of view (on the assumption that your scope is pointing at the dame spot that your axis points...you can adjust things to bring that center into the center of your frame which should get you a reasonable polar alignment. At first you may find that it is actually out of frame but adjust the mount and not the scope to bring it into the center of the frame. It can take a while but be patient ...and you will get a geel for the camera gain settings etc.

When the star trail center is in the venter of frame and you feel you cant get it any better switch the mount on and get it tracking and select a star or object and take a short exposure..
say 30 seconds and check it ..the stars should be round ..if they are try a slightly longer exposure..you will reach a point whete they start to trail so bsck off exposure time and then take a series of subs say 40 or more and stack them in Deep Sky Stacker and see how it turns out. If 30 seconds shows oval stars try 20 seconds...if you still have trails we will need to review polar alignment☺

Good luck please post photos of your progress and results.
Alex
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