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Thread: Polar Alignment in Australia Southern Hemisphere

  1. #81
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    Default Re: Polar Alignment in Australia Southern Hemisphere



    Quote Originally Posted by KeithBC View Post
    I can't help you with southern-hemisphere specifics like what the heck you point at at the south celestial pole. But the issue you ar having is not hemisphere-specific.

    Polar alignment has nothing to do with the scope. It is strictly the mount. There are four axes on your mount. Two are used for polar alignment ONLY, and two are used for pointing at stars ONLY. It sounds like you are trying to use one of them for both purposes.

    So, start by identifying all four movements. Latitude and azimuth are used for polar alignment. RA and Dec are used for pointing at stars.

    When you say that pointing the scope north points it at the ground, that means that you are only using the Declination axis. To point at stars, you need to use both RA and Dec. Unlock both axes and move the scope in two dimensions.
    Thanks i understand all that, but what i was actualy getting at was that to look through the eyepiece it now becomes very awkward. Is that something that we just have to live with or should i be turning the scope in the tube ring so i can look through the eyepiece in a more natural position?

    PS: Thanks to everyone for the input BTW

  2. #82
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    Default Re: Polar Alignment in Australia Southern Hemisphere

    If you need to turn the scope in the rings, then yes, just turn it. If you find yourself doing so often, you might want to make some Wilcox rings to support the scope while you loosen the rings.

    For some reason, most people set up their Newts so that, in the home position, the eyepiece is on the left side (West in my hemisphere, East in yours). There is no reason to do so, other than that the printing on the manufacturer's label is right side up this way!

    Instead, you can set up the scope so that the eyepiece points straight up n the home position. When viewing at high declinations, you will need a step-stool or tall adjustable chair to look down into the eyepiece. But you will find that, at moderate or low declinations, the viewing is convenient for both east and west hemispheres. And you will never have to crane your neck to look up into the eyepiece.

    Furthermore, this position, because it is symmetrical, puts the scope in better balance in declination (everyone balances declination longitudinally, but most forget to balance laterally). This is especially important if you use the scope for imaging, with a camera load hanging off the focuser.

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  4. #83
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    Default Re: Polar Alignment in Australia Southern Hemisphere

    Quote Originally Posted by KeithBC View Post
    If you need to turn the scope in the rings, then yes, just turn it. If you find yourself doing so often, you might want to make some Wilcox rings to support the scope while you loosen the rings.

    For some reason, most people set up their Newts so that, in the home position, the eyepiece is on the left side (West in my hemisphere, East in yours). There is no reason to do so, other than that the printing on the manufacturer's label is right side up this way!

    Instead, you can set up the scope so that the eyepiece points straight up n the home position. When viewing at high declinations, you will need a step-stool or tall adjustable chair to look down into the eyepiece. But you will find that, at moderate or low declinations, the viewing is convenient for both east and west hemispheres. And you will never have to crane your neck to look up into the eyepiece.

    Furthermore, this position, because it is symmetrical, puts the scope in better balance in declination (everyone balances declination longitudinally, but most forget to balance laterally). This is especially important if you use the scope for imaging, with a camera load hanging off the focuser.
    Thanks mate, that was the information i was looking for.


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    Default Re: Polar Alignment in Australia Southern Hemisphere

    Hi vinnie,

    I would love to buy one of those compass set ups if your still making them.

    Let me know the cost and I'll pm you my address

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    Default Re: Polar Alignment in Australia Southern Hemisphere

    Thanks, Vinnie. A friend of mine has an EQ mounted reflector. Your article kicked my brain in to gear. So I have contacted him and he will come and visit me to look at your article. The destructions for his scope are in "chinglish" and references to diagrams are non-sensical. BUT his EQ mount has all the stuff that yours has and feels very well made so it was worth the effort of researching for this information, Thank you very much.


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    Default Re: Polar Alignment in Australia Southern Hemisphere

    I love it thanks

  8. #87
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    Default Re: Polar Alignment in Australia Southern Hemisphere

    Quote Originally Posted by Vinnie View Post
    In the first two photos you will see an aluminium bar that is drilled and tapped to meet the tripod assembly's azimuth pin, and the central mount head locating bolt. There is a scribed central line which is aligned to the compass's lubber line. Here at this time the mag variation is 10.25 degrees East, so true south is at 170 degrees magnetic (close enough, a quarter of a degree is neither here nor there)
    Hi Vinnie,
    I hope you're still around. I have purchased all of the pieces and would really appreciate if you could expand a bit on how you attached the bar to the mount.

    BTW - I haven't even picked up my scope yet, just getting ready so I'm ready to go as soon as I pay the balance and get it home. Your idea seems about the easiest I have read since I started looking for info a few months back.

    Appreciate the help

    Cheers
    Mick

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    Default Re: Polar Alignment in Australia Southern Hemisphere

    This thread is an antique. Vinnie has not been around for at least seven years, and the last post in the thread is nearly a year old. Please check the Terms of Service regarding "necro-posting".

    Thread closed.

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