The celestron skyris 5 position 125 inch filter wheel allows the use of up to 5 different filters in conjunction with monochrome ccd cameras to achieve colour toggle between the 5 filter options while imaging without having to move your camera or telescope to reduce down time if you do need to change a filter there is a quick release door to the internal carousel so that filters can be changed without removing the filter wheel made from machined aluminium construction and high quality compo