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  1. #1
    ehjohnny's Avatar
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    Default An alignment question? LXD-75



    Good day to everyone! I am soon going on holidays and will get a chance to use the 8" acf. I live in a very mature area of town and the trees are, robust is as good word as any. I'v tested the scope "old school" and I'm quite impressed with the optical quality. I'v never used the goto option, most of the alignment stars are behind trees, garages, behind the street light,I'm a newbe and still learning the star names(in my own defence, I do know some stars..lol) ect. So my question: In the scopes manual I noted a one or two star polar alignment. The system(computer) picks Polaris and I can via the menu in the hand controller pick my own two alignment stars. When I chose the above mentioned alignment procedure, The scope tells me it's picking Polaris. The scope will slew to the general area (pretty close actally). Now do I use the hand controller to center Polaris in the ep Or do I use the manual controls fine alt/az and elevation (latitude) control to center Polaris? Hit the enter button and pick the the other two stars. I'v read on the web that you use the manual controls to center Polaris in the ep. The manual seems to imply I should be using the hand controller to center Polaris in the ep. Once Polaris is centered in the ep(using either method?) you hit the enter button the rest of the alignment set up is just like an easy alignment from the manual only difference is you pick the align. stars. So is it all manual or is it all done using the computer? to center Polaris? This might be a case of "over thought"...lol. Any advise would be greatly appricated (even with my bad spelling). I'll have a review of the system when I get back from camping in a couple of weeks. This is why I'd like to get the goto down pat!

    Cheers and clear and still skys

    Johnny

  2. #2
    skinnyonce's Avatar
    skinnyonce is offline Banned
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    Default

    Others will chime in here in a minute or so, please stay tuned

    My fork mounted alt/az sct only calls for using the hand controller,
    I think in alt/az you use the hand controller , and in using an EQ mount you would use the manual adjustments of the EQ mount

    Quote Originally Posted by ehjohnny View Post
    Good day to everyone! I am soon going on holidays and will get a chance to use the 8" acf. I live in a very mature area of town and the trees are, robust is as good word as any. I'v tested the scope "old school" and I'm quite impressed with the optical quality. I'v never used the goto option, most of the alignment stars are behind trees, garages, behind the street light,I'm a newbe and still learning the star names(in my own defence, I do know some stars..lol) ect. So my question: In the scopes manual I noted a one or two star polar alignment. The system(computer) picks Polaris and I can via the menu in the hand controller pick my own two alignment stars. When I chose the above mentioned alignment procedure, The scope tells me it's picking Polaris. The scope will slew to the general area (pretty close actally). Now do I use the hand controller to center Polaris in the ep Or do I use the manual controls fine alt/az and elevation (latitude) control to center Polaris? Hit the enter button and pick the the other two stars. I'v read on the web that you use the manual controls to center Polaris in the ep. The manual seems to imply I should be using the hand controller to center Polaris in the ep. Once Polaris is centered in the ep(using either method?) you hit the enter button the rest of the alignment set up is just like an easy alignment from the manual only difference is you pick the align. stars. So is it all manual or is it all done using the computer? to center Polaris? This might be a case of "over thought"...lol. Any advise would be greatly appricated (even with my bad spelling). I'll have a review of the system when I get back from camping in a couple of weeks. This is why I'd like to get the goto down pat!

    Cheers and clear and still skys

    Johnny

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    ehjohnny (08-12-2011)

  4. #3
    KathyNS's Avatar
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    Default

    If you center the stars manually, the computer doesn't know what you have done. It is only if you center them using the controller that the computer can keep track of how much of a correction is required.

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  6. #4
    ehjohnny's Avatar
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    Default

    Thank you Skinnyonce (me as well..lol.) and thank you Keith. If I understand the manual and their referance; " the same as a easy alignment ". In the easy alignment it never once mentions the manual controls. Always the hand controller. So what Keith is saying does make alot of sence. I relooked at the articals title : Getting the most from your Meade scope part 2. The alignment procedure is called: The Iterative method of polar alignment. The method calls for the user to center the mount on Polaris manually and then slew to a star that is picked from the computer. Vega was the star of choise for the second star. From the moment you picked Vega off the menu, it was all handbox controled till Vega was centered in the ep. You then slew back to Polaris and re-center it using the manual controls(actually you only move Polaris half the distance to center of the ep and reslew to Vega, repeat as nessacery). So for and so forth till when you slew back and forth both Polaris and Vega are in the center of the ep. This is why I thought you had to use the manual controls to start the two star alignment. The more I think about Keiths answer the more sense it makes.This type of alignment is really accurate, seems more suted to astrophotograph. I forgot to mention that you sync on Vega and every iteration you keep syncing on Vega. Dinamite if Lyra is all you want to see! One of my favorites truth be told..lol. I'll let you guys know how it works!! Thank once again to the ppl that reside in this great resource!

    Clear still skies to all!

    Johnny

 

 

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