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Item Description: Super Apochromatic (Super APO) Fluorite Triplet
Lens Diameter: 146 mm
Clear Aperture: 140 mm
No of Elements: 3
Optical glass: Fluoro-Crown Glass (FPL-53 category)
Effective Focal Length: 910 mm
Back Focal Length: 883 mm (measured from the center of the last lens surface)
F-Ratio: F/6.5
Illuminated ring diameter using WO Flattener 68III: 44 mm
Anti-Reflective Coating: SiO2 and/or MgF2
Fully Multicoated: YES
Net Weight: 2.8 Kg
Cell O.D.: 162 mm
Hand Figured: YES
Minimum Strehl: 0.90
