Question about Bushnell NorthStar 78-8830 (525 x 76mm) Telescope

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I cant get an image or focus - Bushnell NorthStar 78-8830 (525 x 76mm) Telescope

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Put the eyepiece with the largest number written on it into the focuser. DO NOT USE the 2 x barlow if you have one. Go outside during the day time and practice focusing on a distant object, by turning the knob on the focuser in both directions until you see a sharp image.

Posted on Sep 29, 2010

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Image not focused


Possible worn out tube. The focus adjustment is on the flyback transformer and has to have the back cover removed to access it. The flyback will be a black and have a red wire connecting to the crt tube. This is very high voltage and can be dangerous. With a plastic screwdriver you can turn the focus adjustment knob on the transformer. Do not adjust the screen control knob. If the focus does not clean up, then the tube is probably worn or the flyback is bad.

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Was shooting full length portraits and my Canon D40 seemed to randomly auto focus on various parts of the image...I would like the entire image in focus...do you think I have a setting wrong .. I am...


Hi Judee,

It is about adjusting the settings.

Click on the link below and watch the video to know more detailed information about your Camera

Click here - > Canon 40D Video

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I have a makusutove 150 1800 telescope and I cant seem to get it to focus correctly - it seems as though the mirrors are focussing the light behind the viewing lens. I can get a focussed image if I hold...


You do not have enough BACK-FOCUS, you need an extension tube for the focuser like this one:

http://www.skiesunlimited.net/index.php?CategoryID=132

Buy the correct size for the focuser hole--

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1 Answer

Ihave bought Nextstar SE4. I aligns and moves but i cant seeanything from the eyepiece. In day light i can see brightwite background but no image. Please help


Put the eyepiece with the largest number written on it into the focuser. This is your lowest magnification.

During the day time point the scope at a distant object and practice focusing -- you may need to turn the focus knob several times right or left to achieve focus.

It will focus if you turn the knob enough.

Jan 14, 2011 | Celestron Optics

1 Answer

Poor focus on a 0.3 megapixel camera supplied with the machine (built in webcam) I have tried to adjust the focus, but these controls are shaded out in the supplied software.


You cant do anything to improve the quality as its the hardware. you cant change the quality of hardware by using any software. You can download other photo editing tools to alter images but the supplied software is the best.

Jan 02, 2011 | Toshiba Computers & Internet

1 Answer

I have a bushnell 78-8876 scope , AM i cant get an image


Put the eyepiece with the LARGEST number into the focuser. DO NOT USE the 2x barlow if you have one. Practice focusing during the day time on a distant object.

If this is a reflector style telescope the focuser is on the UP END of the telescope. The mirror is the bottom of the telescope. Remove the lens cap.

Sep 30, 2010 | Bushnell Optics

1 Answer

I culmated my telescope and cant' get it to focus in. Using the focuser the image stays one big blob without any distinguishing figures.


Did you put an EYEPIECE into the focuser? Probably NOT.

Take the scope out in the day time, put the eyepiece with the largest number written on it into the focuser. Practice focusing on a distant object. TURN the focuser knob slowly until the object comes into sharp focus.

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1 Answer

Etx cant focus


The LPI camera will HIGHLY magnify the image-- about like a 6mm -8mm eyepiece-- tiny adjustments are needed to focus. You can buy a .5 or .3 focal reducer which will widen the field of view and make it easier to focus--

On my LX90 --- it takes about 20 TURNS of the focus knob to go between the eyepiece view and the camera view!

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I cant see clearly in my telescope not matter how much i adjust the focus lines


If it is a focused image but hazy or foggy, you have to clean the optics in your telescope. If you have a focus problem but a clean image, then you are having travel limitations of your focus equipment usually rack and pinion. Wearing eyeglasses can also effect that mechanical problem and so does other added components like "Barlow Lenses" that are used to double or triple eyepiece magnifications. You might also have the lenses in the optical system not in the right order or direction when it was taken apart.

Apr 17, 2008 | Optics

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