I don't know, but why would you get it over the C90? The C90 isn't tiny, but it's small enough not to be an inconvience toting it around and setting it up. So the only reason I could think of to get the C65 (other than saving a few bucks) is if you wanted to pack in it by backpack to the high country to scan for game.
The C90, with 6,362 sq mm of surface area, will let in 91.7% more light than the C65 with 3,318 sq mm of surface area.
