Switzerland from above

There are only 3 ways to remove the prop on a video.
1/ Luck
2/ Synchronise the frame rate with the prop and match the turn so that the prop is hidden between frames. In it’s basic form it is the same method as used during WW 1 to avoid the machine gun shooting off the prop blade.🙂
3/ Fly a twin or Canard.

4/ Use a shutter speed of 1/80 or slower – we did that before. But this is difficult or impossible with primitive movie cameras.

Thank you gentlemen – I was about to order a “propeller-filter” for my camera, and after reading your posts rather convert the cash into Avgas…

The prop filter is basically sunglasses, which force the camera to reduce its shutter speed / increase the exposure time.

Generally speaking movies are shot at 24 frames a second therefore your shutter speed is 1/48th of a .second.
If shooting for television the American NTSC system runs at the same speed whereas the PAL system used 25 frames per second with a shutter speed of 1/50th of a second.
These speeds are dictated by the exhibition method. So on digital You Tube for example you can shoot and play back at say 30fps with a shutter speed of 1/60th.
Basically everything else is a special eg there is a system where you shoot and play back at 60fps.(I can’t remember the name of.the system for the moment) The quality is superb but if shooting on film it gets very expensive.
If the shooting speed and the exhibition speed are different you get a special effect eg slow or fast motion.
As far as still photography goes, there are things you can do with a slow shutter speed .Back in the days when we used to use plate cameras and very slow film to shoot inside eg a church or cathedral you’d set up the camera on a tripod with a cable release attached to the camera. When ready you’d open the shutter and lock it open with the cable release then you’d walk round the church with a flash gun firing off light into the darker areas that you wanted to highlight.
You would end up with an image of the cathedral with no sign of you walking through the frame because of the slow shutter speed.
It is this effect you are sort of getting by adding ND filters when shooting out of an aircraft. By making sure the focal length of the lens focuses past the prop it will only show a slight softening of the prop when it is in the frame in the same way as the softening you get when you shoot through a net. You do not see the net but you do see the diffusion.
ND filters come in varying strengths. Most crews carry 1 to 6. 1 being an increasingly of about half a stop whereas 6 you need bright sunlight as it let’s through very little light.

boscomantico wrote:

Last summer, our member @Frans had a GA celebrity on board with him. Well done! He was quite overwhelmed.

The video has English subtitles.