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Question about Bushnell Deep Space 78-9512 (120 x 60mm) Telescope

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No they did not give me the right stuff they gave me 20mm but it was supposed to be a 60mm

Posted by lilmannie10 on

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Joe Lalumia aka TelescopeMan

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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/

Posted on Apr 04, 2011

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What foclelength of lenses are required to construct a telescope

Eyepieces determine the magnification of the scope-- first determine the focal length of the scope. It should be in the manual or written somewhere on the scope -- let's assume it is 1000mm.

So a 10mm eyepiece will give you 100 power

1000 divided by 10

a 20mm eyepiece will give you 50 power magnification

1000 divided by 20


www.telescopeman.org
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Here are all of Meade's manauals-
http://www.meade.com/manuals/

Contact Meade customer service first here:
http://www.meade.com/support/index.html

If they cannot help you then you may find the proper bolt at a well stocked hardware store.
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DO NOT buy an Edu Science telescope. We receive many complains on these scopes.

Try this web site for a nice small Dobsonian style telescope, like this one.

http://www.telescope.com/control/telescopes/dobsonian-telescopes/orion-starblast-4*5-astro-reflector-telescope
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I can't see anything out of the large scope

Use the 20mm to view an object (building, tree etc.) far away during the daytime. Align the finderscope to the object.
To view the moon, leave the scope out to equalize the temperature for at least 1/2 hour. Use the 20mm and no barlow. Point the scope towards the moon by sighting along the barrel of the scope, then use the finder to zero in on the moon. You may then switch to the 4mm eyepiece. for a more magnified view of the moon. You will have to keep moving the telescope because of the earth's rotation. The higher the magnification, the more you will have to adjust the scope. Because of the cheap finderscope, finding the planets will be difficult. Best to always sight down the length of the scope to get you close. The planets will be small and indistinct.
This is not a astronomical telescope! May be used for views of the moon but the cheap mount is not suitable for other planets. Max power would be 225x NOT 420x as advertised. The erecting prism is for terrestrial use only.
Nothing discourages an amateur astronomer more than a toy store telescope. My advise would be to use this scope for nature watching and go buy a good telescope (Meade, Celestron, Orion etc.). Even Those 60mm refractors are superior to this! A descent scope would cost a minimum of $200
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I went and bought one of these for $25 but the 60mm eyepeice was not is there. I am wondering what other eyepeices can be used for this telescope so I can get greater manification since all i have is the...

Well that's about all it is worth! You bought a toy telescope of about 60mm not much larger than a pair of 10x50mm binoculars which would have been better for astronomy.

You can buy .965 eyepieces on Ebay at Telescope Warehouse. They are almost as much as you paid for the telescope. This is a 2inch scope so your maximum possible magnification in perfect conditions and with perfect optics will be about 100 power. (50 times aperture).

Read my TIPS on my profile page. Next time buy one of these in at least a 6 inch or 8 inch size.
http://www.telescope.com/control/dobsonians/classic-dobsonian-telescopes
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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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http://www.meade.com/support/index.html
right click then slide over the link above..then click copy...then go to you address bar and then paste it in and viola! Hope this helps.
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