BORG 55FL F3.6 & 107FL F3.9ED

John Otteson – a serious astrophotographer sent me his photo taken over the last weekend. Very nice composing.


200mm F/3.6 Borg Apo., Hutech modified Canon6D, IDAS D1 LPR filter, 8 exposures x 7 min. (dithered), ISO 800 (According to John, no dark applied and the flat is corrected with Photoshop. This system has 75% illumination strength at each corner of full frame sensor)

Yes, 200mm with full frame sensor gives us the fun to compose.  John, really gorgeous, congratulations!

a 240mm long CF tube comes in stock and finally the commercial set has been complete. This is Huteh original set, which is only available through Hutech or Hutech/BORG dealers worldwide.




F3.9 Conversion Set



With BORG 50 Guide Scope


~ by tedishikawa on November 5, 2018.

One Response to “BORG 55FL F3.6 & 107FL F3.9ED”

  1. Ted, I love what the 55 mm f/3.6 Borg seems to do on a full frame chip. It would be great if you could give us a link to John Otteson’s full frame, full resolution image. It is hard to judge optical quality in these compressed images. Thanks fritz kleinhans

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