Gaussian blur and the blur from out-of-focus lenses are a different kind of blur: https://en.wikipedia.org/wiki/Defocus_aberration https://en.wikipedia.org/wiki

Gaussian blur and the blur from out-of-focus lenses are a different kind of blur: https://en.wikipedia.org/wiki/Defocus_aberration https://en.wikipedia.org/wiki/Defocus_aberration https://en.wikipedia.org/wiki/Gaussian_blur https://en.wikipedia.org/wiki/Gaussian_blur