You can only use the DCB with a P&S camera. (max zoom 4 X).
However Swarovski has made a new adapter thread for the DCA DSLR with 50mm lens.
[url]http://www.swarovskioptik.us/upload/media/media/40/Digiscoping_Combinations_us[978].pdf[/url]
You can also use yur DSLR camera with the 800 TLS adapter.