ZWO 7-Position EFW (7x2") 2025 Like New ZWO FF131 APO Flat-Field Apochromatic

ZWO FF131 APO Flat-Field Apochromatic Refractor

9mm Width 43

75 pitch) threads

Weight:   405g

Equipped with William Optics' WIFD focuser

ZWO 7-Position EFW (7x2") 2025 Like New ZWO FF131 APO Flat-Field ApochromaticThe Next Generation ZWO EFW Refined Design Anti Light Leak Protection Built for Astrophotography A re engineered internal design helps reduce light leakage, while the refined mechanics deliver smoother, more consistent rotation. The exterior has been subtly streamlined, giving the wheel a cleaner and more cohesive look. Nothing dramatic. Just better in the ways that matter so your imaging workflow stays steady, reliable, and quietly improved. The ZWO