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Thread: Polar Alignment Procedure: Still Confused

  1. #41
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    Default Re: Polar Alignment Procedure: Still Confused



    One question I have. With a polar scope alignment only, do I do the 2 star 3/4 star alignment first? With the All Star Polar alignment it comes in after the 2 star 3/4 star alignment. Seems to me if you utilize the polar scope alignment first this will set up making the 2 star 3/4 star alignment more accurate?
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    Default Re: Polar Alignment Procedure: Still Confused

    Quote Originally Posted by John999R View Post
    One question I have. With a polar scope alignment only, do I do the 2 star 3/4 star alignment first? With the All Star Polar alignment it comes in after the 2 star 3/4 star alignment. Seems to me if you utilize the polar scope alignment first this will set up making the 2 star 3/4 star alignment more accurate?
    I always thought you were meant to align with the polar scope if you had one. An all-star alignment is meant as a means of doing without the polar scope if you can't see the pole star etc. I could be wrong though.
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    Default Re: Polar Alignment Procedure: Still Confused

    The procedure with a polar scope is that you polar align with the polar scope first, optionally do a drift alignment next, then do your goto (2-, 3- or 4-star) alignment.

    For the all-star alignment, the computer needs to be approximately aligned before it can begin the polar alignment, so you do an approximate goto alignment, followed by the all-star (polar) alignment. My understanding is that you then need to do another proper goto alignment.

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    Keith you are correct. Once you complete the ASPA you have moved your mount which then throws your GoTo off. Yneed to power off and and then power on and do another 2 + 1,2,3,or 4 goto alignment. That essentialy puts you right on for goto's as your mount knows it's new location as you moved it after the first goto to do the ASPA. No need to do a second ASPA but I do view the PA and if it not satisfactory an still off I do a second ASPA but that's usually not necessary if I was accurate the first time around.
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    Default Re: Polar Alignment Procedure: Still Confused

    Thanks for the new clarifications
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  7. #46
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    Default Re: Polar Alignment Procedure: Still Confused

    I received a response from a Celestron tech that I thought I would pass on. His polar align instruction is brief and to the point and without the use of calibration stars at the beginning of the routine. Here you go:

    To do the ASPA, you only start by doing a regular two star alignment then you press the Align button and scroll to ASPA. You don't have to do calibration stars. After the mount is physically aligned, turn the mount off and return to the index marks and do the two star alignment again followed by one or two calibration stars.

    The above should help me because I was confused on when and how to transition into the ASPA routine. The break down is as concise as you can get.
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    Default Re: Polar Alignment Procedure: Still Confused

    I received a response from a Celestron tech that I thought I would pass on. His polar align instruction is brief and to the point and without the use of calibration stars at the beginning of the routine. Here you go:

    To do the ASPA, you only start by doing a regular two star alignment then you press the Align button and scroll to ASPA. You don't have to do calibration stars. After the mount is physically aligned, turn the mount off and return to the index marks and do the two star alignment again followed by one or two calibration stars.

    The above should help me because I was confused on when and how to transition into the ASPA routine. The break down is as concise as you can get.

    I've had my CGEM outside waiting for clear skies so I can mount my new scope and work on the above routine followed by some guided images.
    AstroTech 106 Triplet APO, Celestron 11" EdgeHD, AstroPhysics 900GTO, Canon 60Da and a bunch of other stuff.

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    Default Re: Polar Alignment Procedure: Still Confused

    Hi I had the same happen to me with the polar scope - the lens moved and I did not know the orientation of the etchings after I had got the screws back in - I put allen head screws in and cut them down rather than the grub screws. My question to you is did you ever find out what the orientation the etchings are supposed to be? When you screw the scope into a CGEM (DX) you can only screw up to the end of the thread and not adjust it after that - should the etching be in the viewer with the writing parallel looking through the viewer weight hanging down? or does it simply not matter?

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    Default Re: Polar Alignment Procedure: Still Confused

    Hi,

    This thread is several years old. Please read our rules regarding posting to old threads. It is best to start a new thread.
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