Atik EFW3 7-Position Filter Wheel for 2-inch Filters

  • Large Format Filter Wheel for 2-inch round mounted filters.
  • Seven filter positions.
  • Slim 21.8 mm profile.
  • Connects with M54 or M48 threaded adapters.
  • Lightweight. It weighs under 2 pounds. 
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  • Regular price $625.00

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Atik EFW3 7-Position Filter Wheel for 2-inch Filters

EFW3 Filter Wheel:

The EFW3 holds up to seven 2-inch M48x0.75 mounted filters making it ideal for large sensor cameras. With seven positions you will be able to house LRGB, H-alpha, Sii, and Oiii filters in the same carousel.

For a large filter wheel, the EFW3 has a slim lightweight design, weighing 850 g (1.87-pounds) with dimensions of 238 mm x 213 mm (9.3 x 8.39-inches). It is fully compatible with any Atik camera when using the supplied M54 or M42 adapters. The backfocus is 21.8 mm, minimizing backfocus requirements. It is machined from solid aluminum to produce a durable and quality wheel that will keep turning, night after night.


Atik 16200 users can attach the EFW3 directly to the camera to minimize back focus. With the front plate attached, the backfocus of the 16200 and EFW3 is 41.5 mm, while the backfocus with the front plate removed is just 34.5 mm.

ASCOM Driver:

The EFW3 Has a full ASCOM driver allowing users to use with almost any PC software and can also be controlled using Atik's Artemis Capture software.


Back Focus21.8mm
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  • EFW3 body with your choice of filter disk (carousel holds 7 x 2-inch).
  • 2-inch adapter.
  • Hex key kit.
  • 3-meter USB cable.
  • 1.8-meter battery power connector.
  • CD-ROM with drivers, software and user's manual (PDF).
  • Quickstart Guide (paper).
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Luis L.
Mexico Mexico
Every was perfect !!

I’m installing everything and I let you know when every is working