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Thread: Learning the C8

  1. #1
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    Cool Learning the C8



    I have not really used the C8 in my sig much, but for various reasons, not the least of which being I want to learn how to use it, I need to learn how to use it.

    I have had it out in the sun a couple of time (it has a glass solar filter), and last night I took it out for a bit of evening viewing. I figured since the moon is nearly full, it would be a good opportunity to use it in a setting where I am not trying to find new objects, etc.

    Well, I found the moon after a bit - I really need to learn how to use the telescope with just a finder and no telrad or the like...it is pretty tough, the moon may have played a part of that though, I think.

    Anyway, I studied the moon for a good half an hour, focusing on the mountain range Alti Scarp (according to the RASC handbook). A very nice mountain chain along the southern portion of the moon.

    After that, it was kind of flailing on the telescope, like I said, trying to use the finderscope. Anyone have tips to make it a bit easier? It was lined up with the scope, mostly, BUT may have shifted, in the future I will tighten it down more, and hopefully it will help.

    Today, I took it out to try and setup the wedge better, closer to my latitude. The problem with it is that it is not marked, at all. So it is a guessing game as to if I am close to where it should be.

    I think I got it close enough for visual use as moving the RA knob kept the sun mostly in the FOV, it was a little off to the south, but I was able to adjust the DEC to get it fully into view when it drifted out. When I get the power cable for the byers drive, I will be able to tweek it to get it to where it needs to be.

    BTW, sunspot 2403 is very nice to watch as it drifts out of view.

    So I guess this post is part report, part any tips for the moron with the SCT and is, currently way out of his league with it?
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    Default Re: Learning the C8

    Here's a latitude setting trick I use. Gets you close enough for visual work.

    You can do this indoors if you like. You will need a torpedo level.
    This is easier with the scope cover removed.

    First, verify that the declination circle is correct.
    1. Get the tripod as level as humanly possible.
    2. Set the fork so that the telescope declination axis is horizontal. It just needs to be close.
    3. Point the scope up towards zenith.
    4. Place the level across the front of the scope, north to south direction. Adjust the declination until the level is centered.
    5. Note the degree setting on the declination circle.
    6. Rotate the fork 180°.
    7. Repeat steps 3 and 4.
    8. Note the degree setting on the declination circle. If it reads the same, the circle is properly set.
    9. If it is different, IE 38° one way, and 41° the other, loosen the screw in the middle of the dial and adjust half way in the middle
    10. Keep repeating this process until it reads the same both ways.

    Now that this is done.

    1. With the scope pointed up still, set the declination circle to your observing location latitude. For you, this should be somewhere around 42 degrees.
    2. Now adjust the latitude adjustment on the wedge until the bubble is centered.

    All done


    Align your finder scope during the day using a distant object. That will get you close. Then use a bright star or planet to fine tune.


    Scott
    Last edited by smeyer8015; 08-29-2015 at 07:47 PM.
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    Default Re: Learning the C8

    No tips from me buddy, I'd be the in the same boat. Looks like Scott has offered up some great advice.

    Kudos for getting it out there and gathering some photons though.
    Bryan

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    Default Re: Learning the C8

    Just remembered. The latitude scale and pointer is on the inside surface of the wedge side plate.
    wedge.jpg
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    Default

    I am not experienced with an Alt-Az mount, however I do use an inexpensive bubble level to level the tripod. I have read that the declination scales tend to be off so I use a digital level to dial it in within 0.05 degrees (3 arcmins).
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    Default Re: Learning the C8

    You will know you have the mount mastered when you can successfully find objects using the DEC. and R.A. setting circles. I can.

    Scott
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    Default Re: Learning the C8

    These are pics of the wedge. Scott's theory is that the numbers peeled off, which is probably the best theory.

    Anyone have experience with this wedge? Or similar?

    Wedge1.JPGWedge2.JPGWedge3.JPGWedge4.JPGWedge5.JPG
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    Default Re: Learning the C8

    At least someone added the latitude adjuster. It was an option back then. Makes it much easier.


    Scott
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    Default Re: Learning the C8

    Quote Originally Posted by smeyer8015 View Post
    At least someone added the latitude adjuster. It was an option back then. Makes it much easier.


    Scott
    Yeah. One of the sides is missing the screw though, so I have to fix that.

    I will use your process at some point in the near future, Scott. Not tonight....cloudy tonight. Hopefully soon though.
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    Default Re: Learning the C8

    Since your altitude markings are missing; use a protractor level to set your latitude. This can get you to within a quarter degree accuracy. See: https://www.google.gr/search?q=protr...w=1366&bih=649
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