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Diffraction blur with the R5 and four prime lenses

Started 7 months ago | Discussions thread
Sittatunga Veteran Member • Posts: 5,406
Re: Diffraction blur with the R5 and four prime lenses

The other thing to realise is that diffraction is directly proportional to the wavelength. The size of the Airy Disc (which limits resolution) for blue light will be about 4/7ths of that for red light. That's the reason that a BluRay disc can hold several times as much information as a CD; the blue laser means the pits can be smaller and too close together to be resolved by the red CD laser. Sometimes I'm reminded of Douglas Adams' joke about "rigidly defined areas of doubt and uncertainty".

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