ZWO Nikon F to T2 Adapter for EFW Filter Wheel – Version II

ZWO Nikon F to T2 Adapter for EFW Filter Wheel – Version II

DESCRIPTION
The ZWO Nikon F to T2 Adapter (Version II) connects Nikon F-mount lenses (AI, AF, G types) to ZWO’s EFW electronic filter wheel and cooled ASI cameras. It features Nikon F female bayonet on the lens side and a T2 male thread (M42 × 0.75 mm) on the camera side.

With a precise 20 mm backfocus, this adapter meets ZWO’s recommended optical spacing for EFW + ASI systems. It includes fine adjustment spacers for slight backfocus tweaks. Built from black anodized aluminum, it offers a sturdy and play-free connection.

INCLUDED ACCESSORIES
• Nikon F female → T2 male adapter
• Multiple fine spacers for precise backfocus adjustment

TECHNICAL SPECIFICATIONS
• Type: Mechanical-optical adapter
• Lens compatibility: Nikon F mount (manual & AF/G)
• Camera compatibility: ZWO ASI cooled cameras + EFW/EFW Mini
• Camera thread: T2 male (M42 × 0.75 mm)
• Backfocus: 20 mm (adjustable via included spacers)
• Adapter thickness: ~20 mm (EFW-II version)
• Material: Black anodized aluminum
• Version: II, designed for EFW usage
• Installation: Requires removal of rear cover from EFW, screws align adapter