ZWO Darkening Rings for EFW 7x36-II, EFW 5x2 and EFW7x2

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About this product

ZWO Darkening Rings for EFW 7x36-II, EFW 5x2 and EFW7x2 filter wheels. 

Mid-January 2023, ZWO introduced these darkening rings for their 36mm and 2" Filter Wheels to prevent light leakage that can occur, in some circumstances, between the camera and the filter wheel. 

Please note: from January 2023, these rings are included as standard with the ZWO 36mm and 2" EFW. 

Applicable Filter Wheel models are: 

• EFW-5x2
• EFW-7x2
• EFW-7x36-II

These rings will also work with the discontinued EFW-7x36 (1st gen).

Specifications

External diameter: 88mm

Inner diameter: 55mm (2pcs) & 58mm (2pcs)

Thickness: ≤0.2mm

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