ISTAR 140 mm (5.52”) F/6.5 Apochromatic Triplet Objective

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