A little question about Sigma 14-24 sunstar

Hello. I want to purchase a wide angle lens that has great image quality and sunstars. A friend of mine was kind enough to lend me his Sigma 14-24 and said it was great for those requirements.

However, I have also heard that the Canon 16-35 f2.8 iii and f4 can produce marvellous sunstar and decent image quality. So, I am having a difficult time to pick one among them.

Today, I was able to capture a sunstar image (see below) with my friend's Sigma lens. It was taken during sunrise. Shot at 18mm and at f/22.

Do you think the sunstar produced by Sigma is decent against the Canon 16-35 f2.8 iii / f4?

Your thoughts are much appreciated

Thank you for explaining the theory of how sunstars are possible on lenses. To get more spikes, I should probably get a lens with odd number of aperture blades.

Thanks!

Are you implying that the sunstars from Sigma is diffused and not as sharp as the Canon lenses that you have mentioned? If not, do you think the sunstar on my images looks decent compared to the one from the Canon lenses?

I have also seen that video but it mainly focuses on mirrorless lenses (except the Canon EF Mark III). I think there should be differences between the DSLR and mirrorless versions of Sigma.

Thanks! You are right that the sunstar is really a subjective matter because we have different definitions for a beautiful sunstar.

I have compared my shot with other photos taken with Canon 16-35 F4. I realise that the rays from Canon is longer and that the centre is more defined than the Sigma. To me, Canon is a bit better than Sigma, by not much.

What I find interesting from the video is that the gap between the mirrorless Sigma and Canon is much larger than my above comparison. So, it could be that the DSLR version of 14-24 gives much better sunstar than the mirrorless version. Or, it could be related to the source of light. My above observation draws from comparing the sunstar when the photos are taken directly against the sun.