SN021Q 12" f/5.7 (0.8" Quartz)
Obsidian Optics Bench Test
Comments: SN021Q 12.0" f/5.7		Test Date: 4-30-07
Optical diameter: 11.75"		Substrate: Fused Silica
Focal length: 65.75"			Thickness: 0.795" 

Mirror wavefront error < .04 wave PV across both diameters 

Polish, smoothness, diffraction edge, and figure of revolution all excellent
 
 

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