What is the difference between the CFW-8 and CFW-8A and CFW-10?

The "A' designation was added to the CFW-8 when we began using the new filters with integrated IR coatings.  The CFW-8 holds up to 5 filters and connects to the camera's AO/CFW/SCOPE port which means it works directly with both Parallel and USB cameras.

The CFW-10 is sold without filters and can hold up to 10 filters.  It connects to the I2C-AUX port which means it works directly only with the USB cameras.  It can also be controlled by an RS-232 Serial Port.