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.
Marumi filters - there is an old test on the web placing a Marumi filter on the top 3 or 5
Not all are good, but neither are the B+H
Indeed - there is more than small distortion, less flare, more contrast and richer rendition, smoother bokeh, and flawless construction .... the major flaw is indeed the price,
Cought it up or take some cough medicine
Is not for everyone, regarding needs or wallet. Surely is for anyone taking no compromises and wanting the best available.
People complain so much about super UWA and WA prices, but I see way far less complaints with fast super-teles pricing (other than not being able to afford them, as indeed they are at least twice the zeiss 15 price).
Extreme lenses are difficult to build and take a lot of R&D money
(Yes, I have a super-sharp Samyang, TS-e 17 and even tried the 14mm II and Nikon 12-24)