Hello guys, I would like to know, if is possible to eliminate this ugly shrink on top of my len of camera. I belive that is not problem of glass material or problem of HDRi map.
Enable the Extra Objects addon (if you haven’t already):
Then use a polysphere instead of a UV sphere: Shift-A > Mesh > Extra Objects > Basic Objects > Polysphere.
The polysphere is quads only and will therefore not pinch on the poles:
Thank You very much, sir 