Question about Bushnell Deep Space 18-1560 (150 x 53mm) Telescope

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Lost lens to bushnell 18-1561

I have lost my lens to my telescope and I need to replace them but I can't find any. Can someone please help me?

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I have a similar problem with my Bushnell 18-1650!

As you can see below, the plastic thing that holds the lens snapped off from the telescope's diagonal, and is now lost along with the eyepieces. This is a childhood scope I'm trying to rescue!

Should I:
1) glue a new eyepiece straight onto the diagonal
2) buy a new diagonal AND eyepiece
Or do I need to just buy a new telescope?

Thanks in advance.

Lost lens to bushnell 18-1561 - annahetherin.jpg

Posted on Jan 03, 2011

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Other than dealing with the manufacturer parts, knowing the exact specifications of the main lens (the Objective), the lens could be bought from a company called like Jaeger's Optical out of New York, Edmund Scientific Company in New Jersey, and among others. The focal length and the aperature (usually in mm) is all that is needed to order the Anchromatic (color corrected) lens rerplacement. The "f" number is the relationship of the focal length divided by the aperature. It is considered the "speed" of the lens system. It will be exactly the same with the replacement. If there is a choice, the correction factor of the lens should be within 1/4 wave accuracy. This will perform well enough through the different eyepieces. Don't exceed 50-60x of magnification per inch of aperature when viewing.

Posted on Sep 09, 2009

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Many retailers sell eyepieces, here are two. You must measure the hole. Some are .965 and other are 1.25 inch.

Posted on Sep 09, 2009


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