Corey S. Powell on Twitter: "Beautiful engineering: This is the filter wheel for MIRI, one of the Webb telescope's three imaging cameras. Each of the 18 elements here provides a distinct perspective
Mini USB Filter Wheel - Starlight Xpress Ltd
Motorized Filter Wheels, Stepper Motor Driven
Amazon.com : Astromania 2" Multiple 5-Position Filter Wheel for Telescope - Allowing You to Image Without Any Reflections or Stray Light : Electronics