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Zenithstar 73 III Technical Specification
Lens Type : Doublet Apochromatic Prime Lens
Focal Length : 430mm
Diameter : 73mm
F/ Ratio : f/5.9
Optional Flattener : FLAT73A
Focuser : 2.5″ R&P Compatible with EAF
Lens Material : FPL-53
Camera Format : Full Frame DSLR Mirrorless CMOS CCD
T-Mounts Supported : Canon EF, RF Nikon F, Z Sony E Pentax K Micro Four Thirds (M4/3) FUJI X
Tube Weight : 2.83kg
Tube Length (Retracted) : 330mm
Tube Length (Extended) : 420mm