I have never actually seen a Sigma camera in the wild. Maybe because they are ridiculously overpriced for what they are.
I have a camera memory card question. Has the SDXC caught up with CF in speed, at a much lower price? I am looking at large cards for the D800 and I can get 95 read 90 write SDXC cards for half the price of the equivalent CF cards. Seems like I should put the big card in the SD slot with a smaller backup CF. Am I missing something?