20 Most Recent Celestron NexStar 8 SE (480 x 203mm) Telescope Questions & Answers

This is a well documented problem with that scopehttp://www.celestron.com/c3/support3/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=2434http://www.cloudynights.com/ubbarchive/showflat.php/Cat/0/Number/60724/page/72/view/collapsed/sb/9/o/all

That is a good telescope. I am unsure about what adjustments you are trying out, so please excuse me if I get too basic here:The focus adjustment will not give you an enlargement, it only brings objects to a sharp image. I trust that is OK for you.To gain an enlargement of something, you must use a different eyepiece with a shorter focal length, say from 25mm to 12mm. The magnification you will get is the focal length of your scope, 2032mm, divided by the focal length of the eyepiece, say 2032/25, giving you magnification of x81 with that eyepiece. There is a practical limit to this, which for your scope is about x400, (an eyepiece of 5mm) in excellent conditions at the top of a mountain. For terrible seeing from a suburban backyard, it will be say half that, x200, or an eyepiece of 10mm. You will get the best viewing with a magnification of say x150 at the most, or an eyepiece of 15mm. Less is more.Then, you will not ever see the true disk of a star with that scope, they are too far away. You will however magnify the image of a planet, star cluster, nebula, or binary star pair. Sometimes though that will be at the cost of image clarity, it depends on where you are at the time.

Go outside during the day time and line up the top of a telephone pole in the distance in the MAIN telescope eyepiece.

Then without moving the telescope align the small finderscope on the exact same target.

Run the software in XP MODE using Windows 7--- it should work.

Question moved from Televisions category. Celestron Support https://www.celestron.com/pages/support Setup videos https://www.google.com/search?q=celestron+lcm76+setup ..

The Celestron manual for this scope has nothing to say, but on the underside of the focuser assembly, between the 2 focus knobs, you may see 2 screws.They might be thumbscrews or some other screwhead type. One is the adjustment for the focuser internal clearance, or looseness, and the other is a focus travel lock.If present, try backing both off 1/2 turn from tightness, and then experiment to see which is which. The focus lock will have no effect until tight, when the focuser will cease moving, as is now. The other screw will gradually remove looseness and rattle from the focuser until it just moves smoothly, with no back and forth loose feeling at the knob.If neither of these screws is visible you will have to take it to a binocular and telescope shop, where they should not charge much.

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Why not look at the old battery, or look in the manual ?

It is impossible to assess the weight (or more correctly Mass of a star, as weight is a perceived function of Earth's gravity) without knowing the chemical make up of the star. That is why astronomers use the star's measured albedo to qualify and quantify them.

Read the manual. Follow the instructions therein.

You may find you have to aim it at the sky yourself - sounds as if the calibration may be 180 degrees out

I WOULD CONTACT THE MANUFACTURER ON THIS.

Have you looked in the manual ?