ZWO EFWmini Electronic Filter Wheel

Only 300g! Smaller than your hand. Very thin design, 20mm width. The body is CNC machined from a full block of aircraft grade aluminium. 

The step motor is the heart of the EFWmini, which is made by NPM from Japan. You can trust its quality and relability.

Supports both 5 x 1.25″ filters or 5 x 31mm filters. The Electronic Filter Wheel can be rotated in both counter clockwise or clockwise direction for filter selection.

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 USB2.0 hub of ZWO cooled cameras.

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

1.25″ filters won’t have vignetting with up to F/5 focal ratio scopes, and 31mm filters won’t have vignetting up to F/2 lenses.

ZWO RGBL filters are recommended to work with ASI1600, which will offer nearly 1:1:1 RGB color balance.

The full EFWmini Set includes:

EFW mini body, T2 nosepiece, 1.25″ Holder-T2, T2-T2, USB2.0 Cable

1.25″ filter requires: thread length shorter than 3mm, height without thread less than 7mm

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