Finally the scope has come back to me after travelling in Asia.


420mm long & 4.6kg including a motor unit. It’s heaviest among current BORG systems. But still much lighter than the competitor’s. 66mm aperture ED, as 2nd objective lens, is set into a tube inside along with other 3 elements. So BORG-proprietary total 6-element advanced petzval optical design. As far as I know, this should be 1st optical design utilizing both fluorite and ED in same optical train.

Along with the motorized true 3″ FTF, all should be the premium grade optically and mechanically.  And most convenient airline-transportable 4″  astrograph in size and weight.

And here is ready to go under the sky.

I will resume the final field test.


~ by tedishikawa on March 23, 2018.

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