imsabbel

And still, my latest cell phone makes easily better images than my first canon APS-C DSLR.

Maybe patents?

But none of the shots look better than what an old 150-500 sigma lens does on a APS-C.

Take the moon, for example. Sure it has more pixels, but the detail is about what you get with a 300mm on...

Actually, this IS the abberation control element of the mirror telescope, so reduce koma from the sperical mirrors.

https://www.lsst.org/sites/default/files/photogallery/FPA-full.jpg