ZWO EFW (5 x 2″/7 x 2″)
ZWO EFW (5 x 2″/7 x 2″)
ZWO EFW (5 x 2″/7 x 2″)
ZWO EFW (5 x 2″/7 x 2″)
ZWO EFW (5 x 2″/7 x 2″)
ZWO EFW (5 x 2″/7 x 2″)


ZWO EFW (5 x 2″/7 x 2″)

Regular price
$ 299.00
Sale price
$ 299.00
Unit price

In Stock

We have two specifications for EFW2”:

  2″ Thread-In Filters or

50.4mm ±0.5mm Unmounted Filters can be used 

The 2” Electronic Filter Wheel can be rotated in both counter clockwise and clockwise direction for filter selection.


There is no need of multiple cables to power this wheel up, just one USB cable does the trick.The maximum power supply of this EFW is approximately 120mAh @ 5V, which can be operated from the Cooled CCD’s USB2.0 port.

When connected to ASI6200, the distance from the filter to the sensor is about 18mm

Our 2″ RGBL filters are recommended to work with ASI6200MM Pro camera, it will offer nearly 1:1:1 RGB color balance.

Below requirements must be met while using the 2” filter from third-party.



What’s in the box?

1. EFW2*5 or FW2*7 body
2. USB2.0 – 2m cable
3. A bag of M2.5*6 screws (6pcs/ bag)
4. A bag of filter masks for 50mm filters (7pcs/ bag)
5. Phillips screwdriver
6. A bag of M2*4 flat screws (23pcs/ bag)
7. M54M-M48F adapter
8. M54M-M42F adapter


Specifications for the darkening sets(4pcs):

External diameter: 88mm. Inner diameter: 55mm (2pcs) & 58mm (2pcs). Thickness: ≤0.2. 4pcs in total.
* The reason for including the darkening sets is to help solve the light leaking issue occurring in the gap of the filter wheel and camera.

How to install the darkening sets: 

Mechanical drawing

EFW2X5-Mechanical drawing(1)EFW2X7-Mechanical drawing(1)

Usage guider:

Connection methods of ASI6200MM Pro, 2” EFW and M68 OAG to get the best back-focus-length-solutions-55mm:

Personal Upgrade Path

Buy risk-free: When it’s time to trade up you’ll get the most value for your used gear.