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Has anyone tried a Barlow or Powermate on the Star71 for lunar/planetary? I tried a cheap 2x Barlow I have and was not able to focus due to it taking too much back focus. I wonder if a Televue Powermate would be more successful. I also am thinking about trying a Canon EF 2x teleconverter. I would expect something for that would noy increase backfocus at all since it's designed to fit in between a camera and a lens. |
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| Never tried. This is the last OTA I'd use for planetary, it's just not made for it. |
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For what its worth, and more here for people to read / as a reference... I didn't succeed with any of my Baader barlows but did with the TV Powermate 5x I have, at least when using visual (using the WO prism for the Star71)... I did use a 2.25x Baader Barlow to photograph the moon though... https://www.astrobin.com/358363 |
