EFW3 Filter Wheel

7 Position 2″ Electronic Filter Wheel for Large Format Cameras

The EFW3 can carry up to 7×50.8mm unmounted or 7×2” mounted round filters. This is ideal for use with large format cameras. You can house both LRGB and Ha, OIII and SII filter sets in the same carousel, adding more freedom and convenience to your imaging set up.

For a large format wheel, the EFW3 boasts a slim, lightweight design. It measures 238×213mm and weighs in at just approx. 850g. This is great news for large format set ups where weight can be a real concern. That said, the wheel is compatible with any Atik camera through either the supplied M54 adaptor for Atik 11000 and Atik 16200 cameras, or by purchasing an additional Atik EFW M42 (T-thread) camera adaptor for other models.

We’ve simplified the technical side of the design from the EFW2 to further improve reliability and minimise component wear and tear. However, it’s still machined from solid aluminium to produce a durable wheel that will keep turning, night after night.

Atik 16200 users will also be pleased to know that the EFW3 can either be attached directly to the camera as it is, or after removing the front plate to further minimise any backfocus requirements. With the front plate attached, the backfocus is 41.5mm, while the backfocus with the front plate removed is just 34.5mm.

On the software side of things, the EFW3 has a full ASCOM driver. This means it can be controlled with any ASCOM complaint software. Additionally, Artemis Capture can be used to control the EFW3 for simple and efficient operation.

What's in the box?

  • EFW3 body with your choice of filter disk (either 7x2” or 7x50.8mm)
  • 2" adapter 
  • Hex key kit
  • Screws, plastic washers (only with 50.8)
  • M54 Adaptor
  • 3-metre USB cable
  • 1.8-metre battery power connector
  • CD-ROM with drivers, software and user's manual (PDF)
  • Quickstart guide (paper)

Please note that for cameras other than the Atik 16200 and Atik 11000, you will need an additional Atik EFW M42 (T-thread) camera adapter to attached your camera to the EFW3. If in doubt, please talk to your Atik dealer who will be able to make sure you have all the right adapters for your set up.