ZWO 7x 2'' Electronic Filter Wheel  (EFW)
ZWO 7x 2'' Electronic Filter Wheel  (EFW)ZWO 7x 2'' Electronic Filter Wheel  (EFW)ZWO 7x 2'' Electronic Filter Wheel  (EFW)
ZWO 7x 2'' Electronic Filter Wheel  (EFW)ZWO 7x 2'' Electronic Filter Wheel  (EFW)

ZWO 7x 2" Electronic Filter Wheel (EFW)

£399.00✓ 2 year warranty


Out of stock due 10-15 working days

About this product

Model:  zwo_efw-7x2
Part Number:  ZWO-EFW-7x2

New ZWO 7x 2" electronic filter wheel (EFW).

The filter wheel body is CNC machined from a single block of aircraft grade aluminium for maximum strength and rigidity. It also features a quality Japanese-made stepper motor.  

Only 20mm thickness.

Also available in 5x 2" variant.


  • Supports 7x 2" mounted or 50.4mm (+/- 0.5mm) unmounted filters.
  • Quality Japanese-made stepper motor.
  • Rotates in both directions for faster filter selection.
  • CNC-machined from a single block of aircraft grade aluminium.
  • Powered by USB - max consumption around 120ma@5v.
  • ASCOM driver.

There is no need for multiple cables to power this wheel, just one USB cable will suffice. The maximum power requirement is approximately 120mAh @ 5V, so it can be operated from the Cooled camera's USB2.0 port.

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

ZWO recommend their 2″ RGBL filters which work well with the ASI6200MM Pro camera and provide nearly 1:1:1 RGB colour balance.

The requirements shown below must be met if using non-ZWO 2” filters. 

Mechanical Drawing

What's in the box

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

Downloads / Manuals

The following manuals and downloads are available for this product:


ZWO Software and Drivers


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ZWO 2'' LRGB Filter Set
ZWO 5x 2'' Electronic Filter Wheel  (EFW)
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