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Eyepieces

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#451 davidmcgo

davidmcgo

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Posted 24 March 2018 - 09:56 AM

The finder looks like it was modified.  Originally they used a 0.965" 30mm or so eyepiece, so the 27mm Kellner binocular eyepiece should work great.

 

Dave

 

While I hope to eventually fully enjoy the views of my sandcast C8, and the tracking capabilities of its mount, at this point I am quite convinced that the ergonomics of viewing with this telescope do not mix too well with me. One of my difficulties is that due to its short and stubby shape I seem unable to point it close to where I want, and the nice-looking original Celestron 8x50 (? I do not have it here with me to verify the model) right angle finder with a 12.5 mm reticle eyepiece provides a field of view that seems to me too narrow compared to the typical 6x30 finders I normally use. Therefore I get frustrated at the amount of efforts it takes to center the telescope towards what I wish to see.

 

Among the many accessories I bought with this C8, I found a home-made (or small garage shop-made) conversion to illuminated reticle of a binocular eyepiece. A hole was drilled by the edge of the etched reticle glass, a light bulb and wiring rig was held in this hole by a brass-plated steel ring, and a 1.25" metal adapter was threaded to the eyepiece barrel. Has anyone seen similar conversions?

 

Comparing the view of this eyepiece with regular astronomy EPs, I would estimate a focal length of about 25-28mm. I have now converted it to a LED light (green diode salvaged from an old router), using for now just some hot glue to hold the light rig in place. If as I hope this binocular EP will make it easier to find the celestial objects I want, I may switch to a more permanent arrangement.


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#452 CharlieB

CharlieB

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Posted 24 March 2018 - 11:58 AM

I have that 25mm on the end, who makes that? It came with a turret I bought. Very nice eyepiece! Also love the short Celestron by Vixen like your 7mm. I have the 6mm. Wonderful eyepiece

 

-drl

It's a Tani.  Very nice eyepiece.




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