ZWO´s latest EFW (Electronic Filter Wheel) provides a larger clear aperture than the previous ones but is still not heavy - only 650 grams!

The filter wheel body is CNC milled from an aircraft graded aluminum block. It features excellent craftsmanship, is very thin and light with only 20 mm thickness.

Motor drive
The core part of the EFW is the stepper motor which has reliable performance and quality that comes from NPM, Japan. 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 120 mA @ 5 V, which can be operated from the cooled CCD?s USB2.0 port.

Filters
There are two specifications for EFW2?:

• TYPE1: EFW5X2?
• TYPE2: EFW7X2? (this one)

Both accept 2? thread-in filters and 50.4 mm ±0.5 mm unmounted filters.

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

ASI´s 2? RGBL filters are recommended to work with ASI6200MM Pro camera, it will offer nearly 1:1:1 RGB color balance.

The third image show the requirements which must be met while using third-party 2" filters.

Downloads, Drivers:
ZW Optical supplies software and drivers online for free download.