mmm...pancakes

I have lots of photos and some video of the fascinating "pancake rocks", blowholes, geological formations in Paparoa Park.  See here for all sorts of info about the phenomenon.

It's quite a good setup - a paved circle that takes about 20 minutes to walk.  Quite touristy, but very cool nonetheless.  We were fascinated by a group of 5 middle-aged Asians carting around two very large cameras. Question for my photo geek friends:  what are they?  Large-format cameras??