How to see diffraction in photos

Started Sep 21, 2022 | Discussions thread
cba_melbourne Veteran Member • Posts: 6,846
Re: How to see diffraction in photos

Ellinor William wrote:

Diffraction is always happening, but it tends to become a noticeable issue with smaller apertures (bigger f-stop numbers).

At some point with every lens and camera combination, the light doesn’t bend where we want, The light will start “coloring outside the lines” and make your images look soft or slightly out of focus.

Diffraction effects also have some practical uses in photography.

In astro photography, some people add a line objects (like stings) in front of the lens (or refractor telescope) to emulate the starbust effect of the Hubble telescope. Starbursts or sunstars are artefacts caused by light diffracting around the support vanes of the secondary mirror in reflecting mirror telescopes.

We know them as sunburst spikes when it is caused by diffraction at the edges of the iris apertures in our lenses. Often these are highly desirable, and photographers value certain lenses that produce particularly nice looking sunburst rays.

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