ZWO EFW FILTER WHEEL 7 x 2" extension in most cases the rigidity

in most cases the rigidity is higher than with variable extension tubes

5mm port on one side of the ECCO-NTC and to the thermistor jack of dew ring

The aluminium tube is internally blackened to avoid internal reflection

as it is very close to the Hydrogen Epsilon line

ZWO EFW FILTER WHEEL 7 x 2" extension in most cases the rigidityThe 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