I received the Zeiss 28mm today (February 8th, 20167). It is not as large as I imagined. It is “fatter” than the others, but not as tall as the Zeiss 135mm APO, for example. It comes with an elegant box, indeed, which for that money it should. I shoot with the Nikon D810.
I have no photos to show anyone, yet. I can say it will not take any extension, which I would expect from a wide-angle lens. I can use the K-1 Ring on it, which is 5.8mm extension, but I doubt that I will often. One thing: it is very hard to focus, again a feature of many wide-angle lenses. I only use LiveView for focus, but still it is tricky. I have not been able to get so that I feel in full control of it… yet. It is heavy, but does not over strain the mount. The focus throw is not very long (140 degrees), which I don’t like. It should be longer for my work. I can always put it on a focus rail, to stack. I will update as I have something to see that I am happy with.
I have the Otus 55mm and 85mm (and the 135mm APO). My first impressions is that this Otus is not so obviously useful in my work (close-up nature photography) as the previous Zeiss APOs, and not as easy to use, but I am new to it, so this is a problem on my part.
Too cold to go outside. Here is a photo from our kitchen, taken in natural light, which is all the way across the room from these jars. I may not have gotten to color right, but it should give you some idea of the lens. D810, ISO 64, f/16, 1/6 second. Feeling a little more comfortable with this lens, but it is still a stretch from what I usually use. It is sharp.