Question about Bausch and Lomb Harbormaster 68-3576 (35 x 76mm) Telescope

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We have this telescope and are missing a bolt or screw from the side. Can we purchase another one. Also can we purchase new lenses or how should we clean them. There are no scratches but I see a black dot that we cannot figure out how to get rid of through the lense.

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You will not find parts for this imported telescope. But a well stocked hardware store may have the proper bolt or nut that you need.

Eyepieces can be purchased from several on-line retailers they come in 3 sizes-- .965, 1.25, and 2 inch.

Measure the hole in the focuser-- the .965 inch is hard to find check with these two retailers--

http://stores.ebay.com/Telescope-Warehouse

http://www.surplusshed.com/

Use these instructions to clean optical surfaces--
http://www.televue.com/engine/TV3_page.asp?id=103

Posted on Oct 13, 2010

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Once you know the diameter to shop for you can look for the focal length of the eyepiece you wish to purchase. They are rated such as 4mm, 10mm, 25mm, etc. The smaller numbers give you higher magnification. You can calculate the magnification by dividing the telescopes focal length by the eyepiece focal length. For example, let's say your telescope is has a focal length of 360mm and you have an eyepiece rated 10mm. Divide 360 by 10 and that gives you a magnification power of 36.

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Not knowing exactly what is the name of the scope or the model-- do what I do-- go to a well stocked hardware store as most of the bolts and nuts are generic and can be purchased anywhere.

If you post the exact name and model-- maybe we can be more helpful.

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