Outstanding performance ultra slim and easy-to-use 5 position motorised filter wheel for 1.25-inch filters Ultra slim motorized filter wheel - only 0.7 inches (17.7mm) thick! USB controlled and powered - no additional power supply required. No motors protruding from the filter wheel to get in the way. Measuring only 4.5" x 4.75" x 0.7", this is one of the smallest, thinnest motorized filter wheels on the market. Only adds 19mm of back focus to the optical path when used with our adapters. Includes: T thread to T thread adapter T thread to C - thread adapter T thread to 1.25 inch barrel adapter 3 metre USB interface cable The filter carousel is threaded for M28.5 x 0.6 filters. An optional carousel is available for M28.5 x 0.5 filters - please verify the specifications with the manufacturer. The maximum filter cell height which can be accommodated is 11mm, having thread length of no more than 4mm.