ZWO EFW 8x1.25" Filter Wheel: Precision and Convenience for Astrophotography

The ZWO EFW 8x1.25" Electronic Filter Wheel is a powerful tool for astrophotographers, providing seamless and precise control over filter selection during imaging sessions. Designed to hold up to 8 filters of 1.25" or 31mm unmounted sizes, this filter wheel is ideal for monochrome camera setups, enabling detailed multi-wavelength imaging of the cosmos. Its sturdy yet lightweight construction ensures compatibility with most astrophotography rigs, offering reliability and convenience for capturing stunning celestial images.

Why Choose the ZWO EFW 8x1.25" Filter Wheel?

• Large Filter Capacity: Accommodates up to 8 filters (1.25" or 31mm unmounted), enabling a wide range of imaging options.
• Automated Precision: Easily switch filters electronically for uninterrupted imaging sessions and precise adjustments.
• Compact and Lightweight: The CNC-machined aluminium body ensures durability while maintaining a lightweight profile for easy setup.
• USB-Powered Operation: Simplifies cable management by using a single USB 2.0 connection for power and communication.

Perfect for Advanced Imaging

Designed with astrophotographers in mind, the ZWO EFW 8x1.25" allows you to seamlessly integrate multiple filters into your imaging workflow. Capture stunning details in deep-sky objects such as galaxies, nebulae, and star clusters with precision and ease. Its motorized operation ensures silent and accurate rotation, making it a must-have accessory for monochrome imaging setups.

Key Features of the ZWO EFW 8x1.25" Filter Wheel

• Filter Compatibility: Works with 1.25" filters or 31mm unmounted filters (requires filter masks).
• High Capacity: Holds up to 8 filters for versatile imaging applications.
• Durable Build: CNC-machined aluminium construction for longevity and reliability.
• Efficient Power Use: Operates via a USB 2.0 cable for both power and control.
• Silent Operation: Quiet and smooth motor ensures minimal disruption during long exposures.

ZWO EFW 8x1.25" Filter Wheel What's in the Box?

• ZWO EFW 8x1.25" Electronic Filter Wheel
• 1.25"/31mm Filter Masks
• USB 2.0 Cable
• Connection Screws
• User Manual

ZWO EFW 8x1.25" Filter Wheel Specifications

Why ZWO EFW 8x1.25" Filter Wheel is Essential for Astrophotographers

The ZWO EFW 8x1.25" Filter Wheel streamlines your astrophotography workflow, offering reliable and precise filter control for capturing vibrant, high-quality images of the night sky. Its large capacity and compact design make it ideal for advanced imaging setups. With the ability to automate filter changes, you can focus on perfecting your shots while the filter wheel does the work for you.

The body is CNC milled from an aircraft-graded aluminium block.
We decided to make it thinner, where it measures only 20 mm on the wheel body.

The heart of our ZWO EFW 8x1.25" Filter Wheel comes from NPM, Japan, who is the manufacturer of the stepper motor, and the quality is trustworthy and reliable. Guaranteed long life.

The ZWO EFW 8x1.25" Filter Wheel can be rotated in both counter clockwise or clockwise direction for filter selection.

ZWO EFW 8x1.25" Filter Wheel What’s in the box?

1. 8*31mm EFW body
2. 1.25″ cover
3. T2 nosepiece
4. 1.25″ holder(with cover and 2 screws)
5. T2-T2 adapter(male)
6. A bag of filter masks
7. USB2.0 2m cable
8. Phillips screwdriver
9. A bag of M2 screws

How to install the filter?

1.25″ filters required to be: threaded  shorter than 3mm in length,  without threads less than 7mm in height

1. Take the back cover off
2. Lay the wheel down flat
3. Screw in the filters up
4. Put the back cover on

Take the ZWO EFW 8x1.25" Filter Wheel for an example:

31mm and 36mm filter requires: a set of M2 screws and washers needed to fix the filters are included in the package.

1. Take the back cover off. Lay the wheel down flat
2. Hold the filter by the very edges and lay them into the recess for each position
3. Attach the washers, put in the screws
4. Put the back cover on

Take the ZWO EFW 8x1.25" Filter Wheel for an example:

How to connect with the camera and telescope?

How to use it?

you just need to plugin the EFW with USB2.0 cable and install the   ASCOM driver

There are  ZWO Filter Wheel(1) and ZWO Filter Wheel(2) to select,  you can use either one of them

There are 2 ASCOM is for controlling 2 EFWs in one software.

ZWO EFW 8x1.25" Filter Wheel Mechanical Diagram