Sensor Dirt

[Cameraboy6476]

Canon EOS M50 Kit Lens 15-45mm  Using the same lens..the first Photo shot at 1/250 shows no dirt...Second shot at 1/50....dirty.....Can anyone please explain this to me. Put the "clean" verion in lightroom and tried to replicate the "dirty" version by adjusting exposure, texture, and contrast and still no dirt. Thank you everyone.

[jrhoffman75]

Why Sensor Dust is More Visible at Small Apertures (photographylife.com)

[kvbarkley]

Beautiful, thanks. Essentially what you said before.