Question about Vivitar (1607225) Telescope

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Mutiple images Focused on one bright star, I'm getting three images. The central one is brighter but there is one above & one below. Treied it withanother bright star with same result. Can this be corrected?

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The problem could be a vitreal spartion in your eye. Whe looing at a bright star does the images appaer to remain in place when you twist your head around the eyepiece. Do others see the same thing???

If they do then it sounds like a cracked element. This can occur in the eyepiece if the scope has ever been turned to the sun.

Change the eyepiece and see if the problem goes away. If it doesn't then a chipped or cracked primary or secondary is suspect.
Good Luck

Posted on Aug 22, 2008

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Posted on Jan 02, 2017

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My right eye piece will not turn how do I repair it or where can I get it fixed?


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The distance calculation is the diagonal size of the screen times the throw ratio of the projector (x/12 for feet).
If the projector has a physical zoom this plays in as well, throw ratios are usually displayed at 1x or for the whole range (e.g. 82C; 1.2 zoom means 1.43-1.71 throw).

Details:
Light calculations are somewhat inside the scope of this question, but suffice it to say, they aren't fun to do IMHO which is why I like the online calcs for a quick reference. Rule of thumb, the brighter the room or bigger the picture, the brighter the need.

If you don't want to do the calculations yourself, there are hundreds of calculators out there. Projector Central has a good distance calculator that is preset for actual projector specs. I use it often so I don't have to mess with the calculations. Just go to their website and select "Calculator Pro" at the top. It even does estimated light readings (we aim for 80fL because of the bright room environment we have to deal with, but for controlled lighting 30-50 is a good range too.)
There are also apps available on Android and iOS like AV Tools or Alford Calc.

If you want to do precise calculations, you need to know the size of your screen, the throw ratio of the projector and the brightness of the projector (and the brightness of the room) and the reflectivity of the surface (gain).
The latter two of these deal with picture intensity, the fact as your image gets smaller, the image gets brighter; to a point that it can be uncomfortable to watch. The opposite is also true, that as the the image gets larger, it gets darker since the amount of light coming from the projector doesn't change.
And finally, the more ambient light in the room, the darker or more faded the image will appear as it competes with other light sources.


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1 Answer

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Is this a Desktop, or a Laptop. If it is a laptop, you should click the Battery Icon on the lower left corner of the screen. Once you click that, there should be a few options. They are as follows:
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The Balanced and Power Saver options reduce the brightness of the LCD Screen, as well as it conserves energy while running programs and the like. On "Power Saver", your computer may work slower.
If you want your screen brighter, you can select "High Performance". Also, there is an option to personalize each of the three settings. Simply look below the three options where it displays three blue worded links. Click the one that says "More Power Options". This will take you to another page that displays the three settings and below each setting is an option to Change Plan Settings. Once you click "change plan settings", you can choose precisely how bright you want the screen to be for each setting.
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1 Answer

I bought a skyquest xt10i telescope and am trying


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Why not try focusing on the moon or Mars and Saturn. You will always need to re=focus slightly when you move to another sky object.

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1 Answer

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1 Answer

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It is a bad unit. If it's new, get it replaced, there is no repair for this problem. Hope this helps.

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1 Answer

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You can slow down dew forming on the mirror by NOT pointing the telescope toward the sky during cool-down-- just leave it parallel to the ground. Same goes for your eyepieces -- leave them covered, or inside a case.

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2 Answers

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3 Answers

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Please call Jazz Products @ 732-572-7050

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