ZWO Compact Filter Wheel EFW 2 Inch

The ZWO EFW 2 inch filter wheel is specially designed for astrophotographers working with mono cameras like the ASI 6200MM Pro. This filter wheel enables quick and precise switching between different 2″ color and nebula filters without manual intervention — ideal for LRGB, narrowband, or multispectral photography.

Key benefits
✓ Supports 5 filters of 2″ or 50.4 mm (unmounted)
✓ No vignetting, even with full-frame sensors or fast telescopes
✓ Ultra-thin design of just 20 mm thick
✓ Precise NPM stepper motor for silent, accurate filter changes
✓ Lightweight aluminum housing (approx. 500-650 g)
✓ USB connection with low power consumption — no external power needed

What makes this filter wheel special
This compact filter wheel is designed for serious astrophotography with mono cameras. Thanks to its slim CNC-machined design (just 20 mm thick), it fits seamlessly between your telescope and camera without losing optical length. Despite its compact size, it accommodates five large 2″ filters, which is more than sufficient for most photographic workflows (e.g., LRGB + Ha/OIII/SII).

Thanks to the precise stepper motor from Japanese manufacturer NPM, the wheel changes filters silently and extremely precisely, without play or misalignment. This motor is also used in professional equipment due to its reliability.

Compatibility and connection
The filter wheel is particularly suitable for the ASI 6200MM Pro and other full-frame mono cameras from ZWO. Connections are available in M54x0.75, M48x0.75, and T2 (M42) — all internally threaded — allowing flexible coupling with your existing setup. Power is supplied via a single USB 2.0 cable with no external power required.

Mounting and delivery
The filter wheel can be screwed directly onto the ASI6200MM Pro. For instructions on the exact mounting method, please refer to the official ZWO manual.

Included in delivery:
– USB cable
– Filter masks
– Thread adapters
– Mounting screws
– Screwdriver

Technical specifications
Number of filters: 5 x 2″ mounted or 50.4 mm unmounted
Filter type: Nebula, color, or narrowband filters
Thickness: 20 mm
Housing: Aluminum, CNC-machined
Weight: ±500-650 g
Power: USB 2.0, low power consumption
Telescope-side connections: M54, M48, and T2 (internal)
Motor: NPM stepper motor (silent, precise)

Practical application
This filter wheel makes your work more efficient: no more hassle with unscrewing filters in the dark. Effortlessly switch between LRGB and narrowband during a single session, with maximum precision. Ideal for use with full-frame cameras like the ASI 6200MM, also in combination with an off-axis guider.