ZWO 7x2 EFW Electronic Filter Wheel - Next Gen - 7 Position for 2" or 50.4 mm Filters - (Pre-owned) vendor-kowa This problem is clearly recognized

This problem is clearly recognized and often discussed among astronomers but so far there has been no definite solution in the market

52348 Ultima 18-55X 65mm ED Angled Zoom w/smartphone Adapter

Using Dual Axis Encoders Hand Controller: Go2Nova 8407+

5 lbs (12 kg)

Adjustable Sharpness

ZWO 7x2 EFW Electronic Filter Wheel - Next Gen - 7 Position for 2" or 50.4 mm Filters - (Pre-owned) vendor-kowa This problem is clearly recognizedIn good working condition. Sold as is, included parts are shown in the pictures. ZWO 7x2 EFW Electronic Filter Wheel with Anti Light Leak Technology 7 Position, Uses 2" Threaded or 50. 4 mm Unthreaded Filters The 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