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William Optics Redcat 51 - $700 (Yorba Linda)
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William Optics Redcat 51
-Focal length: 250nm
-Diameter: 51mm
-Aperture: F/4.9
51mm objective lens, in a sleek Petzval design, using Synthetic Flouride ( FPL53 and FPL51 ) glass for a full frame flat field image. The optical quality provides for exceptional performance at a fast focal ratio of F/4.9.
I only used it a few times in the backyard trying to learn Skywaycher for astrophotography. I also have Canon EOS adapter that I experimented with bird photography in the backyard. Like all my astrophotography gear it sat waiting for me to learn and use it.