This 5-position electronic filter wheel--CNC-milled from aircraft-graded aluminum block--can fit round 2-inch thread-in or 50.4 mm +/-0.5 mm unmounted filters. A perfect pairing with the ASI6200 camera. The wheel can be rotated counter-clockwise or clockwise for filter selection. And just one USB power cable with a maximum power supply of 120mAh @ 5V is needed, which can be operated from the cooled CCD’s USB2.0 port. When used with the ASI6200, filter-to-sensor distance is approximately 18 mm. ZWO's 2-inch LRGB filters work well with the camera, offering nearly 1:1:1 RGB color balance.