These are most likely hot/defective pixels on the image sensor, not lens dust. A key clue is that they appear in the exact same location from shot to shot. Hot pixels often become more visible during longer exposures, and cameras/software commonly hide them by replacing their values with nearby pixel data.

Based on the results you shared, pixel mapping appears to have fixed the issue. That’s the usual first step if your camera offers it. Many cameras can identify bad pixels and automatically remap them so they no longer show up in images.

What to do:

• Run the camera’s pixel mapping / pixel refresh function if available.
• If needed, process images with software that removes hot pixels automatically.
• Don’t worry too much: a few hot pixels are normal and usually never show up in final images.

This does not sound like sun damage, and it’s less consistent with lens dirt. Sensor dust usually shows as blurry dark spots, not bright colored single-pixel specks.