From SBIG's site:
CLA-5 CAMERA LENS ADAPTER mates the Models ST-5C, ST-237, STV, PixCel 255 and PixCel 237 with popular camera lenses for wide field imaging. Currently available adaptors are for Pentax bayonet, Canon, Olympus, Nikon.
Like I said: this one is for Olympus lenses.
Price: $55, and I'll pay shipping in the lower 48.