Patent: Tiny Canon 100-400mm lens and camera

[Pape]

Why? The sensor size is a big part of a lens size. You can have wide apertures with very small lenses on cameras because the sensor is so tiny.

tiny sensors got tiny lenses cause their focal lenght is around 16mm when tele and 3mm when wide angle .
8mm wide lense with 16mm focal lenght is F2
but yeah looks like its more likely lens what size of field is equivalent with 100-400m full frame.

 

[masterpix]

A 400mm lens on a small drone would need some serious IBIS functionality, as the vibration from the motors is substantial. Not to mention the instability from the flight control system. Folks like DJI use wide angle lenses to 'gloss over' those limitations.

I think you gave them a serious point to think about, by the way, any small 100-400mm lens will have this probelm. A good gimble can solve part of the problem, IBIS or electronical stabilasation devive will also help. I think that most drones use wida angle lens because they aimed at "areal view" not "pin-point" things.