For optical microscopes, Tofra Inc. has released a filter wheel with an integrated controller that saves space. The wheel is compact, measuring 17 mm thick with a maximum package dimension of 180 mm. It can accommodate either 12 filters of 25-mm diameter or 10 filters of 32-mm diameter. Operable both automatically and manually, it runs on DC, connects through serial ports and can connect to a USB port through a serial-to-USB converter. An IR-blocking filter can be installed on the side facing the light source. The wheel can be mounted facing front or back, and it comes with mounting adapters for all major microscope brands.