Why do stars with higher brightness in photographs have a larger diameter? Why do they visually appear large

Why do stars with higher brightness in photographs have a larger diameter? Why do they visually appear large compared to faint stars?

The size of the diffraction disk does not depend on the brightness of the star, but is determined only by the diameter of the objective. The phenomenon of photographic irradiation is decisive in the formation of a star disk in a photograph. In visual observations, light scattering occurs in the turbid environment of the optical components of the eye. The phenomenon of irradiation is more pronounced in objects with a higher brightness.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.