ZWO Electronic Filter Wheel (EFW) - 8 x 1.25″ or 7 x 36mm

ZWO Electronic Filter Wheel  (EFW) - 8 x 1.25″ or 7 x 36mm


In stock - Shipped 1-2 working days.

Model:  zwo_efw_8x1.25
Part Number:  Z604-EFW-8x1.25
Brand:  ZWO



  • EFW Body (8 x 1.25" / 31mm or 7 x 36mm)
  • T2 Nosepiece
  • 1.25" Holder to T2
  • T2-T2
  • USB2.0 Cable
  • M2 Screws & Washers for 31mm Filters

New! ZWO EFW - small and light weight 8x 1.25" or 7x 36mm position filter wheel - only 400g!


  • Supports 8x 1.25" mounted filters /  8x 31mm unmounted filters or 7x 36mm unmounted filters.
  • Stepper motor made by NPM from Japan - quality and reliability you can trust.
  • Rotates in both directions for faster filter selection
  • CNC machined body from a full block of aircraft grade aluminium enabling a very thin 20mm design.
  • Powered by USB - max consumption around 120ma@5v
  • ASCOM driver

Filter to sensor distance when connected to the ASI1600 is around 10mm, you can use 1.25" filters without vignetting up to f/5 or 31mm filters up to f/2.

Includes M2 screws and washers required for fixing unmounted 31mm filters.

Important Note: 1.25" filters require threads shorter than 3mm and the height without threads must be less than 7mm.


There are currently no specifications available for this product.

The following manuals and downloads are available for this product:


ZWO Software and Drivers


ZWO Electronic Filter Wheel (EFW) - 8 x 1.25″ or 7 x 36mm Questions & Answers

Please fill in the form below to ask a question.

Your Name: *
Your Email Address: *
Your Question: *
Please add the two numbers

Be the first to Write a Review for this item!

Customer Services Report
October 2017 / View Older
Positive Feedback read all 4689 comments
Enquiries Responded to within 6 working hours
Orders Completed within 2 working days