ZWO EFW Mini 5×1.25 inch Filter Wheel

ZWO EFW Mini 5×1.25 inch filter wheel is an ultra-compact motorized wheel for astrophotographers working with mono cameras and 1.25-inch filters. Its lightweight design, quiet stepper motor and minimal distance between filter and sensor allow you to change filters quickly and accurately without touching your camera or losing focus.

The filters sit just 10 mm from the sensor, preventing vignetting - even on fast telescopes with an f-value of 2. This makes the EFW Mini ideal for LRGB shooting, narrowband work or photometry in a mobile or compact setup.

The filter wheel is controlled directly via a USB 2.0 connection, with no separate power supply. The connection on both sides is T2 (M42x0.75), and a 1.25-inch mount is included for alternative mounting.

Key benefits
✓ For 5 x 1.25 inch or 31 mm filters
✓ Only 10 mm distance between filter and sensor - no vignetting
✓ Lightweight aluminum housing, only 300 grams
✓ Compact: only 20 mm thick
✓ Silent stepper motor for precise filter changes
✓ USB-powered, so no external power supply required
✓ Works seamlessly with ZWO ASI mono cameras and ASIAIR

Application in practice
The EFW Mini is perfect for astrophotographers who want flexibility without sacrificing precision. Ideal for automatically switching between filters during sessions while maintaining focus. Its compact size and low weight also make this filter wheel excellent for mobile setups or use on lighter mounts.

Technical specifications (practically translated)
Number of filters: 5 x 1.25 inches mounted or 31 mm unmounted
Housing: Aluminum, CNC-machined
Thickness: 20 mm
Filter distance from sensor: 10 mm
Weight: 300 grams
Connections: T2 (M42x0.75), including 1.25-inch mount
Motor: Stepper motor
Power supply: USB 2.0 (150 mA consumption)
Compatibility: ZWO ASI mono cameras, ASIAIR

Included
- USB cable
- 1.25-inch mount
- Adapter rings
- Screw set and screwdriver