ZWO EFW Mini: Compact and Precise Electronic Filter Wheel

The ZWO EFW Mini is the ultimate tool for astrophotographers looking to simplify their imaging process with seamless and precise filter switching. Compact yet powerful, this electronic filter wheel is designed for filters up to 1.25" or 31mm, making it the ideal choice for monochrome imaging setups. With its lightweight design and robust construction, the EFW Mini ensures effortless integration into your astrophotography rig while maintaining excellent performance.

Why Choose the ZWO EFW Mini?

• Compact and Lightweight: Weighing just 300g, the EFW Mini is perfect for balancing on lightweight imaging setups.
• Versatile Filter Compatibility: Compatible with 1.25" or 31mm unmounted filters, making it suitable for various imaging needs.
• Seamless Automation: Electronic control allows for easy switching between filters without disturbing your telescope’s alignment.
• Efficient Operation: Powered via USB, the EFW Mini consumes minimal power while delivering consistent performance.

ZWO EFW Mini Unmatched Precision for Monochrome Imaging

Designed for astrophotographers using monochrome cameras, the ZWO EFW Mini lets you capture stunning detail across multiple wavelengths by switching filters effortlessly. Whether you're imaging galaxies, nebulae, or planets, the EFW Mini ensures accuracy and reliability throughout your imaging sessions.

Key Features of the ZWO EFW Mini

• Filter Compatibility: Works with 1.25" filters or 31mm unmounted filters.
• Power Supply: Single USB 2.0 cable for both power and communication.
• Sleek and Durable Design: CNC-machined aluminium construction ensures durability while maintaining lightweight portability.
• Silent Operation: Quiet, smooth, and efficient motor for filter wheel rotation.

ZWO EFW Mini What’s Included in the Box?

• ZWO EFW Mini
• 1.25"/31mm Filter Mask
• USB 2.0 Cable
• Connecting Screws
• User Manual

ZWO EFW Mini Specifications

Why Choose the ZWO EFW Mini for Your Setup?

The ZWO EFW Mini brings efficiency and convenience to astrophotography, allowing for precise filter control at the touch of a button. Its compact size, silent motor, and reliable performance make it the perfect companion for monochrome camera setups. Say goodbye to manual filter swapping and focus on capturing incredible images of the cosmos!

ZWO EFW Mini The body is CNC machined from a full block of aircraft-grade aluminium.

Very thin design, 20mm ONLY

The step motor is the heart of the ZWO EFW Mini, which is made by NPM from Japan. You can trust its quality and reliability.

Supports both 5*1.25″ filters or 5*31mm filters

The Electronic Filter wheel can be rotated in both counterclockwise or clockwise direction for filter selection.

Only one USB Cable is enough to power up the EFW, the max power consumption is around 120ma@5V, so you can connect it from the USB 2.0 hub of our cooled cameras.

The distance between the filter and sensor is around 10mm when you connect it to ASI1600.

So 1.25″ filters won’t have vignetting up to F5 focal ratio scope and 31mm filters won’t have vigentting up to F2 lens

Our new RGBL filters are recommended to work with ASI1600, it will offer nearly 1:1:1 RGB color balance.

What’s in the box?

1. EFWmini 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

Mechanical drawing

How to use it?

you just need to plugin the EFW mini 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 for controlling 2 EFWmini in one software.