Basics of cameras

3 important questions on Basics of cameras

Thick lenses - Vignetting

Rays that belong to off-axis located objects are partially blocked if multiple lenses are used --> drop in brightness

Depth of field - small aperture diamter

Large depth of field (also dark images) - object further away from focal plane can also be focussed

Point-spread function (PSF) / circle of confusion

Intensity profile of a defocussed point on the image plane

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