sepiareverb
genius and moron
There were some large format lenses that had perforated aperture blades, gave a soft focus effect as I recall. Never owned one, but saw one in the studio safe somewhere I worked.
ferider
Veteran
I think it's a great idea and technically feasible with modern LCD or glass technology.
With a conventional aperture closed down, shooting at a light source will give you rays, like this (maybe shot at f8 or so):
You can count the rays in the star pattern (in this case 10 around the sun), and will find that this nr. matches the number of aperture blades (for an even number; for an odd number of blades, you have twice as many rays). Just the slightest irregularity in aperture opening will cause this. Your design idea would make this disappear.
Roland.
PS: and yes, you can explain it via Fourier transform or convolution
With a conventional aperture closed down, shooting at a light source will give you rays, like this (maybe shot at f8 or so):
You can count the rays in the star pattern (in this case 10 around the sun), and will find that this nr. matches the number of aperture blades (for an even number; for an odd number of blades, you have twice as many rays). Just the slightest irregularity in aperture opening will cause this. Your design idea would make this disappear.
Roland.
PS: and yes, you can explain it via Fourier transform or convolution
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