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p.1 #13 · OT: Always something new ... | |
Adobe demonstrated this a long time ago. It uses multiple lenses to record the image so that effectively the data recorded effectively contains distance information as well as the usual pictorial stuff. Effectively it's a 3D camera. That allows d.o.f. to be set after the shot was taken since the distance of every component is can be calculated, and therefore the appropriate increase in blur can be determined for each pixel. Interestingly it also provides increased depth of field and sharpness due to multiple lenses seeing the same objects at calculable distances. If you have ever viewed good stereograms you will have noticed that the grain pattern seems to dissolve, since it is different in each image, and sharpness seems to be greater than the lens would normally supply. There is probably a low-light downside, since the composite lenses must have smaller apertures than one big one. Maybe their light is still cumulative, I don't know, but it would seem that there must be a downside for the trick of capturing 3D data on smaller lenses and sensor parts.
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