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#1 drober23

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Posted 14 February 2013 - 03:37 PM

I bought a telescope from an acquaintance. He wanted it out of his garage. It looks like a 6" newtonian on a GEM, but it is completely un-labeled.

Is there any way for me to tell who may have made it, and what the f-ratio is? Here are some photos:

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It came with a 2x barlow, some plossi eyepieces (25, 10, 6.5mm), and a couple filters. Everything moves and nothing looks broken.

Any insight on what I have would be useful. Thanks!

DJ

#2 MikeBOKC

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Posted 14 February 2013 - 04:46 PM

Suggest you post a pic or two with a similar thread down in the classic telescopes forum. The folks who hang out there are very good at identifying obscure equipment.

#3 SKYGZR

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Posted 14 February 2013 - 07:46 PM

To find the aprx f/l, measure from about the mirror surface, up to the diag, then down through the focuser to the diag, and to aprx the focal plane of an eye piece, then add the two together. 48" would be an f/8 for 6" dia mirror, which looks about right from the pic.






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