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New William Optics 91mm

AstroGS
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AstroGS

AstroGS

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Just seen this on Facebook (William Optics group) - 450mm-ish??

2025 RedCat 91 f4.9
New advanced 5 element Petzval design includes 3 super ED used
Image circle 50mm
The central star point has an RMS radius less than 1.3μm, and the star point at the full frame corner is less than 2.1μm,
Available by November 2024
 
Image3.thumb.jpeg.9642d1d56fff193b6f5a37332321c797.jpeg
 

Image 4.jpeg

Edited by AstroGS
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