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Have a question? We'd love to help. Email: Call Us: (587) 336-6621 Toll Free: 1 (866) 310-8844

ZWO 5-Position Mini EFW for 1.25"/31mm Filters (ZWO-EFW-MINI)

by ZWO
Original price $249.00 - Original price $249.00
Original price
$249.00 - $249.00
Current price $249.00

Product is not in stock at the moment but we expect it to arrive soon.

New stock is arriving all the time. We will let you know an estimated timeline for when your reserved item will arrive.

The smallest and most lightweight 1.25″ Electronic Filter Wheel in the world!

Description Overview

  • The step motor is the heart of the EFWmini, which is made by NPM from Japan. You can trust its quality and reliability.
  • The Electronic Filter wheel can be rotated in both counter clockwise 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 connected it form the USB2.0 hub of our cooled cameras.
  • The distance between the filter and sensor is around 10mm when you connect it to ASI1600.
  • Very thin design, 20mm and only 300g. Smaller than your hand!
  • The body is CNC machined from a full block of aircraft grade aluminium.

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

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

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

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 is for controlling 2 EFWmini in one software.

What's In The Box (refer to picture)

  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

Customer Reviews

Based on 2 reviews
David Grass
A must for remote operation

I’m surprised at how quiet and precise the ZWO EFW mini is. Easy to set up. It has one job.. to give the the filter you want when you want it - without having to go to the telescope.

Ivan B.
I had originally bought the mini manual

I had originally bought the mini manual. After using that for about a year a half, I figured I would upgrade to the automatic version so that I didn't accidently nudge the telescope every time I changed the filter. This did the job without issue.