Ten position motorized microscope filter wheel features a removable filter carrier system that enables the wheel to be configured for 25 mm diameter, 32 mm diameter filters, or any combination of 25 and 32 mm diameter filters. A proprietary built-in electronic shutter increases reliability and is designed for up to 20 million cycles. High resolution encoding provides accurate filter positioning. The filter wheel is software and hardware compatible with the previous generations of proprietary filter wheels. Adapters are available to mount the new filter wheel to any commonly available microscope.