ZWO Compact Filter Wheel EFW 2 inch

The ZWO EFW 2-inch filter wheel is specially designed for astrophotographers working with mono cameras such as the ASI 6200MM Pro. This filter wheel allows quick and precise switching between different 2” color and fog 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
✓ Ultrathin design of only 20 mm thick
✓ Precise stepper motor from NPM for quiet, precise filter changes
✓ Lightweight aluminum body (approx. 500-650 g)
✓ USB connection with low power consumption - no external power supply required

What makes this filter wheel special
This compact filter wheel is designed for serious astrophotography with mono cameras. Thanks to the slim CNC-machined design (only 20 mm thick) it fits seamlessly between your telescope and camera without losing optical length. Despite its compact size, there is room for 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 changes the wheel silently and extremely precisely, without backlash or misalignment. This motor is also used in professional equipment because of its reliability.

Compatibility and connection
The filter wheel is ideally suited 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 screwed in internally - so you can flexibly link to your existing setup. Power is supplied via a single USB 2.0 cable and requires no external power supply.

Assembly 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 manual of ZWO.

Included are:
- USB cable
- Filter masks
- Threaded adapters
- Fastening screws
- Screwdriver

Technical specifications (practically translated)
Number of filters: 5 x 2” mounted or 50.4 mm unmounted
Filter type: haze, 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: Stepper motor from NPM (quiet, precise)

Application in practice
With this filter wheel, you work more efficiently: no more hassle unscrewing filters in the dark. Switch effortlessly between LRGB and narrowband during a single session, with maximum precision. Ideal for use with full-frame cameras such as the ASI 6200MM, also in combination with an off-axis guider.