Is this amount of internal dust enough to have an effect on photos? It's visible clearly through the aperture from both sides of the lens. : r/AskPhotography
real backlit dust particles with real lens flare | Stock image | Colourbox
LENS DUST COMP - YouTube
11 Ways To Improve the Sharpness of Your Images, Part 6: Dust and Condensation | Fstoppers
What To Do With Dust Inside Lens
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compositing nodes - Create Dust on Camera Lens Blender - Blender Stack Exchange