Zeiss Otus 28mm review by Ming Thein: “don’t even think about using this on the A7RII without the vertical grip”.

Carl Zeiss Lenses – NEW Otus 1.4/28

Ming Thein tested a preproduction version of the Otus 28mm lens. And of course he can claim this is the best wide angle lens of the world. He also has a recommendation for Sony A7 camera owners who want to use the lens on their camera. The lens is so big that…

Don’t even think about using this on the A7RII without the vertical grip, because your fourth and fifth fingers will cramp very quickly as they try to counteract the torque from the lens on the small grip. And thanks to the adaptor, all of the weight is very far forward. But at least you’ll get stabilisation and a true DOF representation. The lens really needs a tripod mount (even for a D810).

Some more Otus 28mm tidbits:
Image samples shot on the A7rII by Photographyblog.
Zeiss Goes Wide with Otus 28mm f/1.4 Lens (Explora)
Otus now listed at BH in Nikon (Click here) and Canon (Click here) version.