Guide :Optics : NorthStar 78-8831 (525 x 76mm) Telescope

78-8831 Just got a 78-8831 and set it up according to instructions. After inserting lens into eyepiece, I can't see anything at all. Dont worry, I've removed the front cap from the the main telescope. Something leads to believe I'm either missing something real fundamental or my telescope is broken. Please help

Posted by jennygio on Dec 26, 2007

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Cannot see anything.


In addition.... you can download the complete manual immediately here : http://www.astronomics.com/main/documents/bushnell/78-8890_northstar.pdf cheers
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Cannot see anything.


Start by adjusting the focus draw tube all the way in, then back a little bit. In the day time indoors, remove the lens from the draw tube. Look into to the draw tube. You should be able to see your eye centered in the mirror. If you cannot see your eye at all, either the primary is tipped drastically or the secondary mirror is way out of adjustment. In that event I would return this scope to where you got it.
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78-8831 Just got a 78-8831 and set it up according to instructions. After inserting lens into eyepiece, I can't see anything at all. Dont worry, I've removed the front cap from the the main telescope. Something leads to believe I'm either missing something real fundamental or my telescope is broken. Please help


There is a mirror that can be moved to use the top or back eyepiece.The lever is at the back on the leftDeon
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I can't see anything through the Main Telescopic Tube


Did you take the lens cap off?You have a small 60mm refractor style telescope. Put the eyepiece with the largest number written on it into the telescope. DO NOT USE the 2x barlow which you might have that doubles the magnification of the eyepiece. Your scope is too small to use the barlow. Remember most binoculars are 7x50mm. So your aperture is not much bigger than a pair of binoculars.Now go outside during the day time and practice focusing on a distant object using the eyepiece with the largest number written on it.This may also help you:http://www.texasastro.org/telescope.php
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4.5 inch reflector telescope --can't see anything


Try pointing it at the moon first-- with the 20mm and practice focusing it. The moon is up just after dark right now.
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Bushnell telescope 78-9669


You must first learn how to focus it in the day time. Put the eyepiece with the largest number written on it into the focuser-- do NOT USE the 2x barlow if you have one. Practice focusing on a distant object. The red dot FINDERSCOPE must also firt be aligned with the main tube -- it is used to POINT the scope at an exact spot in the sky.Objects in the night sky are tiny and the scope must be pointed directly at them to see anything. Locate a local Astronomy club and they will help you. Also read the manual completely.www.telescopeman.orgwww.telescopeman.uswww.telescopeman.info
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Hi, I have an old Edu Science telescope with tripod, mini top mounted telescope/finder, and 4 other eyepieces/leses. I looked for the closes one I could find because I am missing something to allow me to see out of the main telescope,


Can you focus on a distant object during the day time? Do you still have the "diagonal" if this is a refractor style telescope? This is a diagonal it goes into the focuser and then the eyepieces go into the diagonal. Put the eyepiece with the largest number written on it into the diagonal and practice focusing during the day time. DO NOT USE the 2x barlow if you have one.http://www.amazon.com/b?ie=UTF8&node=3426071 These are diagonals.
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Just black Hi I just recently bought a Meade ds-2114ats-tc and I tried to use it last night with the kids, unfortunaltey after we set up the telescope all we could see was black. Yes we did make sure that the lens cap was off and that there was nothing blocking anything, we also tried setting it up in a couple of different spots in the back yard where we were close to a light source and also away from a light source. Basically everything I tried did not work but I am new to this so I could be doing something wrong still. I tried to manually look at the brightest star in the sky and still nothing....just black. Could I be setting this up in an area where there in either not enough light getting in or to much? This is my first time using a telescope so I don't even really know if I should be setting this up in the complete dark area or with a light source around like a backyard light for example. I am extremely confused please help.


I just got one of these today and they are different. My guess is you are having a focusing problem rather than alignment. Assuming of course you are removing the larger dustcap and not just the smaller one ha ha ha. The instructions include how to align but maybe you can use this Mine has two dustcaps, one full size with a smaller one in its center. Had the smaller one been offset it could have been used as an aperture stop to reduce thermal effects on bright objects such as Jupiter and the Moon. Another thing is a built in barlow within the focuser draw tube. This inreases the focal ratio of "f" number and makes align far more trickier than if it had been a straight Newtonian. Set-up the scope under and point at the bright blue sky in the day time. Pull off the small center dust cover and make sure the diagonal holder is centered under the small hole in the larger dust cover. If not that can be accomplished by adjusting the three thumb nuts on the front edge of the tube. Once this is done remove the larger dust cover and peer into the focuser from the side with the eyepiece removed. You should see blue sky and all the components should be centered. One can judge fairly well that their eye is centered but a simple trick is to draw an eyepiece sized circle on a piece of paper and using a pick or pencil, poke a small hole dead center on the circle. Place the circle centered over the draw tube and peer through that. No other tool will improve on the accuracy of this almost free and simple one. Now moving your eye closer to the focuser you should see the reflection of your own eye or in this case the hole in the center of the paper. The paper reflects and transmits enough light that it provides a bright enough targert to canter. Now you must experiment to determine which component is mis-alighned and what adjustment is required to correct. Try flexing each componet before loosening any adjustment screws.This will give you an idea of which component and in which manner it needs to move. Now my guess is, while you have some mis-alignment the almost f:9 focal ratio makes the image extra dark and so contrasty that if you are out of focus all you will see is dark. With your 28mm eyepiece, now point the scope at a daylight scene some distance away and bring the image to a focus. Note hoe far your draw tube is extended so you will be in that neighbohood come night time. I suspect this was your problem more than mis-alignment.
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Cant find the stars


You need to have the sighting scope and main tube realigned.
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