How Fast Do You See?
Have you ever wondered how fast (in terms of shutter speed) the human eye is seeing? How fast are we able to focus? I was surprised by the answer.
Walking around the yard on a very windy day last weekend I noticed a pinwheel going round and round as fast as it could possibly go – just a big, round blur. The colors all merging together looked so pretty – I’ve got to take a picture!! Grabbed the camera already set at ISO 400 and snapped this shot at 1/800.I was a little shocked when I checked the image – quite surprised that at 1/800 the movement was almost frozen. Not at all what I expected.
So let’s slow things down a bit. Changed the settings to ISO 100 which brought me to an exposure of 1/250.
Let’s slow things down some more – brought the aperture to f/22 leaving the ISO at 100 – this led me to an exposure of 1/50.
Personally I was very surprised that the human eye sees things at roughly 1/50 sec. I know this was hardly a scientific experiment but you get the idea. I totally thought our eyes were faster than this – what did you think?