LOL!!! (Once again....What kind of hood do you have on that $3000 lens?). Funny post!
The attached is the "Dumb assed end"
I must admit I didn't research enough before I purchased, the Images from this Lens are 2nd to none among my ultra WA lenses, of which I own several, Canon 14f/2.8L II, Canon 8-15f/4, canon 17TSE, 14-24f/2.8 Nikon, Canon 15f/2.8.
With the exception of the 17TSE, all my WA lenses are purchased first for Underwater WA, secondary function, Landscape, but I sort of suck at Landscape.
I just couldn't imagine anyone handicapping a Lens by having a fixed Lens Hood like the Zeiss 15, in my view, "Dumb Assed".
And, after trying several Circular Polariser Filters it wasn't until I found the Heliopan Slim that I found a Polariser that didn't cause Vignetting, but that Heliopan cost $500 bucks.
So, amazingly sharp, beautiful contrast, smoothest Manual Focussing system I've experienced, but a dumb assed Lens Hood system.
Yes, as has been shown by others you can remove it, but after laying out 3k for a Lens anyone that brings a spanner or a screwdriver within 3 metres of this Lens while on my Camera, is a dead man, or women.