Xagyl Ultra-thin 7-Position Robotic Filter Wheel (RD36)

Xagyl Ultra-thin 7-Position Robotic Filter Wheel (RD36)

Due to high demand and global product shortages due to the pandemic, please call for availability.

The Xagyl Communications ultra-thin 7-position robotic motorized filter wheel is the perfect compliment to any astrophotographer requiring the use of multiple filters.

The light-weight and ultra-thin design introduces very little load, moment, or shift in focal position. The robotic filter wheel housing is cast from light-weight Aluminum, with a machined aluminum filter wheel which accepts 7 x 36mm unmounted filters. All critical parts are black anodized and threaded to suppress stray light.

Very low current operation. The Xagyl robotic filter wheel is powered from the USB port, for convenient one-cable operation. The filter wheel is ASCOM compliant.

Robotic filter wheels are good for people who want to do LRGB photography using dichroic (interference) filters. The standard RGB palette can be created, or the Hubble palette can be created using SII, Ha and OIII filters mapped into the RGB planes, or your own custom arrangement. Filter wheels are used with monochrome and color CCD and CMOS cameras.

The Xagyl robotic filter wheel uses an on-board USB to RS-232 adapter. It can be easily controlled through simple ASCII commands should anyone want to write their own control scripts in lieu of using ASCOM. For example, F1 = move one filter position forward, B3 = move three filter positions backwards, P4 = move to filter position 4.


  • One of the smallest, thinnest motorized filter wheels available - only 0.7" thick
  • Accepts 7 filters
  • USB controlled and powered - no additional power supply required
  • No motors protruding from the filter wheel to get in the way
  • Adds 19mm (.75") of back focus to the optical path when used with included adapters
  • ASCOM Compliant
  • Firmware upgradable


  • T thread adapters (M42 and M48)
  • 2" barrel adapter
  • 3m (10') USB interface cable


  • Accepts a total of 7 x RD36mm unmounted filters
  • Filter thickness range: 1 - 4mm
  • Backfocus requirements: 19mm (.75") when used with included adapters
  • Dimensions: 19.3 x 20.3 x 1.8cm (7.6 x 8 x .7")
  • Weight: 737g (26oz)
  • Made in Canada
  • One year warranty

Computer Requirements

  • Minimum: Pentium II 400Mhz, 98MB RAM, 200MB hard drive, CD/DVD-ROM drive, USB 1.1/2.0, Windows 2000/XP/Server 2003/Vista/ Server 2008/Windows 7 (x86/x64) and Server 2008 R2 (x86/x64).
  • Recommended: 2Ghz, 1GB RAM, >80GB hard drive, USB 2.0, Windows 7
  • USB Compatibility: USB 2.0 High Speed and USB1.1, full-powered ports
  • Future Technology Devices (FTDI) embedded RS-232 interface is Mac compatible (drivers on their website), but at this time there is no official support for this filter wheel on the Mac. The commands are plaintext, 2 bytes long; advanced computer users can easily add support.