Solar Activity 092915 & New Achromat Lenses for Solar and Guider

Here is 7-hours solar activity today. Unfortunately there is still the heat wave from the ground though.

092915I’m now working the new project for the Japanese-made high quality achromat lenses, which will fit BORG series 80 tube assembly and be suitable as solar scopes. Probably one of them will be a proper guide scope for users who are looking for larger aperture and longer focal length too. I will disclose more details here later on.


~ by tedishikawa on September 30, 2015.

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