Question about Tasco 350x50mm Refractor Novice Telescopes

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I am a beginner, and I no longer have a manual. My telescope is a model type 78-4678, 900 mm focus length, 4.5 inch objective lens. I am unable to get any images with my telescope, regardless of which lens I use, and despite making my attempts in an area with little light interference. Basically, I am failing miserably at using this item, and would appreciate a step by step breakdown on precisely what to do.

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  • chaney1 Aug 30, 2008

    bought my tasco 420 second hand have no idea how it works, to me it looks out of allignment, if i take the lens out i see the edge of the mirror and the tube side and some light, i certinally get no image with the lens in, i have no instruction book and no idea what to do. please help


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This is a very simple refractor style telescope-- put the diagonal into the back of the telescope then put ONLY the eyepiece with the largest number written on it into the diagonal. Practice focusing during the day time -- on a distant object.

This is just like the scope Galileo used 400 years ago! Nothing to it-- but realize that it is ONLY 50mm in aperture the same size as a pair of 10x50mm binoculars.

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Posted on Jul 09, 2011

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I think you are asking for a replacement focuser. You can probably find one here: http://www.ebay.com/itm/4-5-or-6-Telescope-Reflector-Tube-1-25-Newtonian-Focuser-Metal-Plastic-NEW-/360936594869?hash=item54097f5db5

A manual is another question. These scopes are imported and no manuals are available. However the manual only has assembly instructions it does not tell you how to use the telescope to find objects in the night sky.

Find a local Astronomy Club and the members will help you set it up-- very easy once you see it done 1 time.

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Most telescopes use a standard fitting eyepiece with a 1.25 inch outside diameter barrel. You can measure the mount where the eyepiece goes to make sure that yours is this size, then search on eBay or Amazon for "1.25 eyepiece" and you will find many available. None of these will be made by "Edu-Science", but any make will fit.

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I have a Barska telescope. Model: 60800. Diam: 60mm Focal length: 800 mm. I think I put it together correctly, but I can not see anything through it... just black. Yes, I have taken the cap off the...


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Starting out, you want to use the lowest power, so the highest number, eyepiece. Do NOT use the Barlow lens if one came with the scope. Try it out during the day (but never point a telescope anywhere near the Sun). This will make it easier to find the focus point. There is a very wide range of movement in the focus mechanism, because different eyepieces focus at different points, but the actual focus range for any eyepiece will be a small part of the overall range afforded by the focusing mount.

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The manuals DO NOT tell you how to find objects in the night sky, they are only assembly instructions. Wish you had not bought that telescope, this type would have been better for a beginner.

http://www.telescope.com/control/product/~category_id=classicdobs/~pcategory=dobsonians/~product_id=09804

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Read my tips on my profile page.

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The Company does not exist-- anymore.

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Also during the day put the eyepiece with the largest number written on it into the focuser. This is your LOWEST magnification. Practice focusing on a distant object. The image will be upside down--- this is perfectly normal. Nothing is wrong with the scope.

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Buy two books: Turn Left at Orion and Nightwatch.

Download the free monthly star charts at:
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You can watch there videos to learn about Astronomy for beginners--

http://vimeo.com/channels/tas

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www.telescopeman.org
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Watch the video and audio podcasts on these web sites.

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Here's the link to the manual if you need it; http://www.tasco.com/products/manuals/specialty_30076150.pdf call; 1-800-423-3537 and they will be able to tell you how to get a replacement OL Hope this helps :)

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