Free Shipping On Many Items

The Telescope Authority
Since 1947

View Shopping Cart

Your Cart is Empty

ZWO Five Position Electronic Filter Wheel - 1.25" and 31 mm


- Read
  • Free Shipping

  • More on the Way in 14 - 28 Days

Add to Wishlist

Got questions? Click for live chat

  • Weighs only 300 g and is Smaller Than Your Hand!
  • Amplify Your ZWO Camera's Potential!
  • Filter Positions: Five.
  • Filter Position Sizes: 1.25-inch/31 mm.
  • Power Consumption: 150 mA at 5V.

Product Details

  • The ZWO Five Position Electronic Filter Wheel - 1.25" and 31 mm is a compact and valuable choice for use with your ZWO cameras. Machined from a single block of aircraft-grade aluminum and weighing less than a pound, the ZWO EFW is a perfect accessory for your astrophotography cameras!

    The ZWO Five Position Electronic Filter Wheel Features

    Optimized Design

    Each filter wheel readily accepts 1.25-inch or 31 mm filters. Switch effortlessly between the filters, with its counterclockwise and clockwise turning feature. This filter wheel is perfect for use in conjunction with the ZWO RGBL filter set in conjunction with the ASI1600!

    Free of Vignetting

    A 10 mm gap between the sensor and filter means you won’t experience any vignetting when in conjunction with ZWO cameras! Versatile Power The maximum power consumption of this device is about 150 mAmps at 5V! You can use the single USB cord to power the ZWO Filterwheel Mini from the USB hub of one of ZWO's cooled cameras while using it!

    OPT Product Number: ZWO-EFWMINI

  • specifications

    Back Focus20 mm
    Camera/Eyepiece Side ConnectionFemale M42x0.75
    Filter Positions5
    Filter Size1.25"/31mm
    Free ShippingYes
    Power TypeUSB (Digital Use)
    Scope Side ConnectionFemale M42x0.75
  • included items

    1. EFW Mini Body
    2. 1.25-inch Cover
    3. T2 Nosepiece
    4. 1.25-inch Holder (with cover and 2 screws)
    5. T2-T2 Adapter (male)
    6. A Bag of Filter Masks
    7. USB 2.0, 2 meter length Cable
    8. Phillips Screwdriver
    9. A Bag of M2 Screws

Product Reviews

Customer Reviews
5.0 Based on 12 Reviews
5 ★
4 ★
3 ★
2 ★
1 ★
Customer Photos
Write a Review Ask a Question

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
  • filters
  • camera
  • 1.25
  • coma corrector
  • ASI Studio
  • products
  • Astronomik LRGB 1.25
  • exposure plan
  • shipping
  • filter selection
Bradley M.
United States United States


Very good, it allowed me to use different filters easily. Attaches directly to my ASI533MC camera.

Kevin D.
United States United States

The ZWO 5 position electronic filter wheel is excellent

The filter wheel was packaged very well. Insertion of the filters was quite simple. The filter wheel was incorporated into my imaging train quite easily. Drawing power from the ZWO camera is a real plus as it avoids another cable into my laptop. The filter wheel functions smoothly and quickly and has yielded excellent results to date.

Kyle H.
United States United States

Works well, easy to use!

I've only had this filter wheel for a few days and used it a few times, but it's already been well worth it. It's very easy to set up with filters (in my case, Astronomik LRGB 1.25" filters, also purchased from OPT), just take care not to lose the tiny screws when installing them. The wheel is practically plug-and-use and works nicely with ZWO cameras and the ASI Studio software. All you need to do it plug the wheel into the camera or PC, manually set the filter selection or set it up in the exposure plan, and you're set. The wheel itself is sturdy and quiet when moving and is simple to attach to the camera and scope or coma corrector. OPT's shipping was fast and well-packed, which was great at a time when so many astro products are backordered. If you're looking for a simple filter wheel that'll also save you time in astrophotography, this may be what you need!

OPT Telescopes ZWO Five Position Electronic Filter Wheel - 1.25 and 31 mm Review
Byron L.
United States United States

great filter wheel!

I have a manual filter wheel, but it was a lot of work and time to carefully move the wheel, and many times I had to reposition the image. For planets, this gave Winjupos a real workout, and made processing tougher. Now I pick the filters I want on Firecapture and things go quick and smoothly.

Jerry C.
United States United States

ZWO Five Position Electronic Filter Wheel-1.25”

Easy installation, takes up very little room in the optical train, very user friendly and solid construction. Works great for me and my Explore Scientific 127 mm APO refractor. Highly recommend.

Michael M.
United States United States

Great filter wheel

I like the filter wheel. I have it connected to my ASI 183mm pro usb hub on the back of the camera and when you connect the camera to the computer it will also connect the filter wheel. I can confirm that you can screw in 1.25" Astronomik filters 6nm narrow band just fine. That's the filters I use. I had trouble getting the clamp ring attachment off of the camera side of the wheel to the point that I thought it was permanent. Eventually it came unscrewed with effort, so if it seems tight keep trying. Maybe I was a little light because I didn't wasn't to break it.