Meta4. Thanks for your answer.With ISO 100, your average scene in sunlight would require an exposure of roughly 1/100th sec at f11+
If you wanted a shutter speed of 1/60th and use f5.6 you would have to reduce the light by about 3 stops
Using f2.8 would only increase the light falling on the sensor and cause overexposure problems
ND filters aren't to prevent blown out highlights. They reduce the light levels uniformly across the frame .
If you have some areas much brighter than the average of the scene, you can still get blown out highlights with ND filters.
The idea is to reduce the light levels to give proper exposure when using slower shutter speeds.
If you aren't familiar enough with photography, it might be an idea to leave out the ND filters for a while and just get the hang of flying and then using the camera.
You can try ND filters when you are more experienced rather than trying to do everything at once.
You'll still get reasonable looking video without video and it would be one less complication to get your head around while you're beginning.
You say that you have to reduce the light by about 3 stops when having a shutter speed of 1/60th and f5.6. Is that based on experience or based on a math formulation?
- You say that ND filters reduce the light levels uniformly across the frame. Does that mean that lets say a value of 1 gets reduced by 30% to 0.7, that a value of 0.5 gets reduced to 0.35? Isn't that just a simple multiplier?
- Would the image/video be roughly the same if I hypothetically would have same ISO100 and 1/60 shutter, but:
1: f2.8 + ND filter
compared to
2: f5.6 without ND filter?
- And what is the benefit of having slower shutter speeds? Because you mention regarding the ND filter that the idea is to reduce the light levels to give proper exposure when using slower shutter speeds. It feel metaphorically a bit like Tom and Jerry.
Wasn't there a rule of thumb to use for instance 1/60 shutter at 30 fps, and probably 1/120 shutter at 60fps?
- And which ND filter would one recommend when using the drone on travels to countries in the Mediterranean?
Sorry for the questions. But some answers actually raised more questions rather than answers.