Question on Zeiss 1.8/24 ZA on star effect

kapanak wrote:

From my experience, the sunstars have to do largely with the shape of the aperture iris and the number of blades. Most High End M-mount lenses (are there eve low end ones? Perhaps Voigtlander) have 8-12 aperture blades with unique iris shapes, often curved inwards. That contributes to having little stars on light sources.