ZWO EFW FILTER WHEEL 7 x 2" extension as it is very close

as it is very close to the Hydrogen Epsilon line

The aluminium tube is internally blackened to avoid internal reflection

This adapter allows you to replace the stock focuser of the Borg 90FL & 107FL f/3

Note: This is NOT compatible with the previous version of the ZWO filter drawers

ZWO EFW FILTER WHEEL 7 x 2" extension as it is very closeThe Next Generation 2025 ZWO Electronic Filter Wheel 7 x 2" is a major upgrade over the previous generation with a new anti light leak design and refined mechanics for smoother, more consistent rotation. The new 2025 EFW series introduces a series of structural refinements to eliminate light leakage from all directions, including: Upgraded Sealing A re engineered slot fit chassis provides a tighter mechanical interface between the front and rear