Canon Bob
Loves the Enemy
- Messages
- 9,754
- Name
- Bob
- Edit My Images
- Yes
This isn't specific to photography but I thought this might be the best place to get an answer.
If I look at our LED "fairy lights" then the red, yellow, green and blue LED's all appear to give the same size pool/point of light. If I stick my reading glasses on then they're blurred and the red is smaller than the yellow which is smaller than the green and the blue is the largest (approximately 4x the area of the red). If I take a camera lens and defocus it then all the "bokeh" circles are the same size...as perhaps one would expect. Various pairs of reading glasses all show the same size increase by colour but the camera lenses all maintain a uniform size circle when defocused. I understand the principle of lower wavelength light scattering more but this doesn't seem to fit the experiment.
What gives?
Bob
If I look at our LED "fairy lights" then the red, yellow, green and blue LED's all appear to give the same size pool/point of light. If I stick my reading glasses on then they're blurred and the red is smaller than the yellow which is smaller than the green and the blue is the largest (approximately 4x the area of the red). If I take a camera lens and defocus it then all the "bokeh" circles are the same size...as perhaps one would expect. Various pairs of reading glasses all show the same size increase by colour but the camera lenses all maintain a uniform size circle when defocused. I understand the principle of lower wavelength light scattering more but this doesn't seem to fit the experiment.
What gives?
Bob