ZWO EFW Electric Filter Wheel 5 x 2"

The filter wheel body is CNC milled from an aircraft graded aluminum block. Excellent craftsmanship, very thin and light with only 20mm thickness. The core part of our EFW is the stepper motor which has reliable performance and quality that comes from NPM, Japan.

Both 2" thread-in Filters and 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.

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

Filters (not including the threads) must be less than 7.5mm in thickness and less than 50.8mm in diameter. Threads must be less than 2.7mm in thickness.

What's in the box? 

• EFW2*5
• USB2.0 – 2m cable
• A bag of M2.5*6 screws (6pcs/ bag)
• A bag of filter masks for 50mm filters (7pcs/ bag)
• Phillips screwdriver
• A bag of M2*4 flat screws (23pcs/ bag)
• M54M-M48F adapter
• M54M-M42F adapter
• Darkening rings sets(4pcs)

Specifications for the darkening sets

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.