Thread: [SOLD] 1/70 RMS certified 10" Primary
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Old 05-04-2011, 06:36 PM
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Astro78
Tripping in Space

Astro78 is offline 		 
Join Date: Oct 2007
Location: Sydney
Posts: 500
Quote:
Originally Posted by bert View Post
Hi,

What is the focal ratio or focal length?

Brett
It's 1.35m or a focal ratio of 5.38. This from the report from Optic Wave Labs in California, I haven't measured this myself.