Bushnell Deep Space 78-9512 (120 x 60mm) Telescope - Answered Questions & Fixed issues

Yes, Bushnell maintains a web site with all of their manuals here:

http://www.opticsplanet.net/bushnell-warranty.html

Look down the above web page.

You need an eyepiece This scope uses .965in eyepieces. you can find them on Ebay. Maximum magnification is 100x NOT 420x. These scopes have inferior optics and terrible mounts. Don't spend much on this scope. Buy a 20mm (35x magnification) http://www.ebay.com/itm/Astro-Optics-20mm-965-Telescope-Eyepiece-NEW-/230688144635?pt=LH_DefaultDomain_0&hash=item35b615bcfb or a 15mm (45x magnification) http://www.ebay.com/itm/Astro-Optics-20mm-965-Telescope-Eyepiece-NEW-/230688144635?pt=LH_DefaultDomain_0&hash=item35b615bcfb on Ebay If you are interested in astronomy, you need to spend some money on a good scope. Check out Orion for a great tabletop dob for $100 http://www.telescope.com/Telescopes/Dobsonian-Telescopes/Mini-Dobsonians/Orion-SkyScanner-100mm-TableTop-Reflector-Telescope/pc/1/c/12/sc/28/p/9541.uts

This is a simple refractor telescope. Put the diagional into the focuser and then put the eyepiece with the largest number written on it into the diagonal. DO NOT USE the 2x barlow.

Take the scope outside during the day and point it at a building or telephone pole in the distance-- take the lens cap off. Practice focusing the scope on the distant object until you get a sharp clear image.


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Eyepieces can be cleaned using these instructions:

http://televue.com/engine/TV3_page.asp?id=103

If this is a reflector the mirrors can be removed and cleaned using this method: watch the video:

http://www.youtube.com/watch?v=9Y8xFnXFVGQ&feature=related



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Dear Glajauin,
No. It is not possible.
Thanks.
Dhananjay

Why would you need a 60mm eyepiece? I doubt these can even be purchased since I have never seen anything over 50mm -- this is a VERY low power eyepiece! The bigger the number the lower the magnification.

The normal ones would be 20mm-25mm and a 10mm-12mm.

This company sells eyepieces-- they come in 3 sizes, .965, 1.25, and 2 inch. Measure the hole in the focuser and buy the correct size:

http://www.agenaastro.com/

All of Bushnell's manuals are on this web site:

http://www.opticsplanet.net/bushnell-warranty.html

Below this is a link that takes you through each step using both pictures and written articles.
Hope it would help solve your problem.
http://www.bushnell.com/manuals/telescopes/78-9512_Deep%20Space.pdf

Contact Bushnell here:

http://www.opticsplanet.net/bushnell-warranty.html

You don't need it-- instead just download the free Stellarium planetarium software here:

http://www.stellarium.org

Put in your location and it will show you the sky for any time or date. It's a really neat free Astronomy program.

There is a good website for beginners with these small scopes at THIS LINK

To start out, try the scope with the LEAST powerful eyepiece (the one with the biggest number) in daylight (but never point it anywhere near the Sun). You need to zero in the finder scope in daylight too, or you will never be able to find objects with the main scope at night. If you got a Barlow lens with this scope, throw it away.

All of Bushnell's manuals are on this web site:

http://www.opticsplanet.net/bushnell-warranty.html

You put the prism into the focuser and then the eyepiece with the largest number written on it. DO NOT USE the 2x barlow until you learn how to focus properly.

All of Bushnell's assembly manuals are on this web site:

http://www.bushnell.com/products/other-products/telescopes/instruction-manuals/

All of Bushnell's manuals are on this web site:

http://www.bushnell.com/products/other-products/telescopes/instruction-manuals/

You realize that this is a very small aperture telescope. Not much bigger than a pair of 10x50mm binoculars. You have about 2 inches or so of glass-- so your maximum possible magnification is some where around 100 power.

60-70power is more than enough to see the cloud bands on Jupiter or the rings of Saturn and of course the moon. Stars are always stars, just points of light, regardless of the size of the telescope.

You should use the eyepiece with the largest number written on it-- this is your LOWEST magnification. The 2x barlow which you may have will probably be too much magnification is used along with the eyepiece with the SMALLEST number written on it. Locate an Astronomy club and the members will help you with your telescope.

Go to the URL below it is the online complete manual for this telescope from Bushnell, it is free

http://www.bushnell.com/manuals/telescopes/78-9512_Deep%20Space.pdf

I would not buy a Bushnell or Tasco brand telescope regardless of the price. You can do much better than these "toy" telescopes.

Check out this web site:

http://www.telescope.com/control/main

That's because the 5 mm is too much magnification for your small telescope. Maximum magnification is a function of APERTURE. Which is how big is the front lens or the mirror.

Your scope has about a 2 inch aperture, so the maximum posiible magnification is about 100 power (if it is like the one in the picture above)

50 times aperture (2 inches)-- 100 power

It will only achieve 50 times if the optics are perfect and the sky is very transparent and stable. Usually only 30-40 times is all you normally get.

Eyepieces come in three sizes, .965, 1.25, and 2 inch. Measure the hole in the focuser and buy the correct size. Here are two retailers that sell eyepieces.

http://www.agenaastro.com/

http://www.optcorp.com/category.aspx?uid=30