I dont know about the Dragon but for the Fs7 Im pretty sure its like the F5/55, in that over 66Fps you are not reading off a 4K sensor.. the camera cant get the data off the sensor quick enough at that FPS.. there is then options ,full scan..the 4K sensor but pixel binning..(not line skipping though).. or Center crop.. the camera will read off a roughly s16 size .. centre crop of the sensor..
Advantage of CC no pixel binning,and the OLPF will work as its still corresponding to a 4K sensor.. just reading the centre only.. disadvantage you will have a crop factor on your lenses FOV.. 1.8 I think it is..
Disadvantage of full scan.. be careful of fixed pattern noise.. you now have a 4K OLPF on a 2K sensor.. (the F5/55 you can physically change the OLPF to a 2K one.. but the Fs7 you cant)
Advantage .. your lens FOV will stay the same..
Can you shoot outside? then your lighting problems will be alot less..
If your shooting Slog with the Fs7.. the camera will only record at ISO 2000.. regardless of any other settings.. (unless you burn in a LUT over the Slog,which is of course then no longer Slog)...
Edited by Robin R Probyn, 22 April 2016 - 09:59 PM.