ZWO EFW electronic filter wheel 8x31-25

ZWO EFW electronic filter wheel 8x31-25

Description

The ZWO EFW 8x31-25 is part of the next-generation ZWO electronic filter wheels. Its internal structure has been refined to help eliminate stray light, which is essential for deep-sky astrophotography and long-exposure imaging.

This model supports eight 31 mm unmounted filters. The body is built from CNC-machined aluminum alloy, providing a compact, rigid, and durable structure. The internal filter carousel is made from 6061 aluminum alloy to ensure stable and reliable rotation.

The filter wheel operates without an external power supply and is powered directly via a USB connection. It draws 120 mA at 5 V and connects through a built-in USB-C port using the included USB 2.0 Type-A to Type-C cable. Software compatibility includes ASIAIR, ASIStudio, ASCOM, and the ZWO SDK. The design is presented as plug and play, with no driver installation required.

Light-leak protection is achieved through an upgraded sealing interface between covers, added lateral light-blocking pads, and a fully enclosed motor compartment. A high-precision stepper motor ensures smooth and consistent operation during extended imaging sessions. Automated filter switching is supported when used with compatible control software such as ASIAIR.

Technical specifications

• Model: EFW 8x31-25

• Type: electronic filter wheel

• Use: astrophotography

• Supported filters: 31 mm

• Slots: 8

• Power: USB

• Current draw: 120 mA

• Voltage: 5 V

• Port: USB-C

• Included cable: USB 2.0 Type-A to Type-C

• Body material: CNC-machined aluminum alloy

• Carousel material: 6061 aluminum alloy

• Motor: high-precision stepper motor

• Light protection: sealing,blocking pads,enclosed motor

• Software support: ASIAIR,ASIStudio,ASCOM,SDK

• Mode: plug and play

• ZWO filter compatibility: yes