Another consideration... if you're interested in using the CCD with Canon DSLR lenses. The Atik 383L+ CCD+EFW2 combination requires too much back focus, and can't be used with Canon EOS lenses - it's only a couple of mm too long.
The ST-8300M, when paired with one of the SBIG filter wheels specifically designed for the ST-8300M (such as the
FW8-8300 for 8 x 36 mm filters), on the other hand does work with Canon EOS lenses
with this adapter.
Inserts are available so that 1.25" filters can be used in the 36 mm FW8-8300 wheel.