I dont know for sure, but you'd likely have to buy a very highend camera that takes detachable lenses and such. The highest opticals I've seen are about 20 or so and thats on a cheap panasonic or something. All the consumer grades like the Sonys are maxed out about 15X on the optical.
I've got a Sony DCR-TRV340, by no means highend but is more than adequate. It has 25x optical zoom and I put a 2x doubler on it for 50x optical. Works great! It definatley isn't "PRO" equipment but for less than $500 it can't be beat.
