Here is the graph for an overcast, cloudy day. The month is April. Springtime.
The camera was set at 1/125 sec and iso 100. I used an 18% grey card.
Please excuse the poor graphing. I feel from the experience of recording during a day like this that the lighting is going to be a little unpredictable. Note the double peaks.
So here we have a clear day. More predictable, note the gradual rise then a plateau before the decline. At the moment, the sun is behind a mountain ridge until about 8.45 am and then dips behind another at about 5 pm.
I can imagine how as the seasons progress the sun will rise earlier. the plateau in summer would be longer and the decline more gradual.
In winter it would be the opposite.
No comments:
Post a Comment