[Manual Focus] I got my first Zeiss, the Mulvis 15/2.8 last week. I was extremely impressed with that lens. Although manual focus, it has since kept the Sigma 12-24 and Nikon 16-35 in the bag. And I sent an Irix 15/2.4 Blackstone (a very nice lens actually) back. That initial experience gave me the confidence to order the Otus 28/1.4 and 55/1.4. I have not had full manual lenses since my Canon and Nikon film SLRS and my Mamiya and Rollei MF cameras. TBH, I wasn't sure if my decades-older eyes would be up to the task. Well, I am still not sure about that part, but this lens and the 810A are superb together. P, A, and S modes work flawlessly. I took it out today for a few dozen shots during early afternoon. Light was bright and a bit flat, uninteresting to say the least. But this lens is just extraordinary. Color richness and fidelity, the almost-3D effect of DOF, corner-to-corner sharpness, lack of distortion, resolution, all amazing. I have Sigma 35/1.4 and 24/1.4 Art lenses that I picked up primarily for astrophotography. This lens takes their place, as well as the Nikon 24-70/2.8, and every other lens that covers this range. Yes, it's big and heavy; this is not a kit for speed pack ascents. But I will haul these lenses around the world in the next couple of months, because once you have seen what they deliver, there is no going back.

[Full-Frame] This is a superb work of art lens that has remarkable quality written all over it. The pictures are sharp and the resolution is as well. The color rendition is very accurate. There is slight distortion but easily corrected. There is a bit of chromatic aberration but also easily corrected. This lens performs as well as one can expect. It is probably best at ASA 64 and raw. It requires attention to detail to get its maximum yield. I am sure that a pro that has a particular use for this lens will be delighted with the results, but it is a LOT of lens for the skilled amateur and the hefty price makes you have to think about its role in your photography. I have owned it twice and just could not justify it despite it being the finest lens I owned. I own the Otus 55, the Otus 85 and the Milvus 135 all of which are sensational. The Otus 28 slightly lacks the snap of the others, but with after processing can yield some smashing photos. If I had unlimited resources, I would own it for the occasional app I could find for a lens of this caliber.

[0.18x] This will become my go-to landscape lens. It is wide enough for most situations, and can always go portrait and shoot stitched panos. Sharpest lens I have used and has a great color/contrast quality like my Leica lenses. It is a monster however, in size and weight. Glad I recently purchased a truck to drive in to the mountains. This lens is not for backpackers.

[5.18 lb] This lens is a landscape and astroscape photographers dream lens. Coma at f1.4 very minimal for stars, see my image shot at f1.4 ISO 1600 10sec shutter. Vignettes more than my Otus 55mm but can be corrected, I would reduce half a star for this. Shooting into the sun does not produce flare like my other wide angle lenses but it has very minimal flare. See attached image. With this image I went through the pano in seconds because I don't have to shoot extra images with finger covering the sun for flare. It is heavy, bulky but for now with the results I'm getting I can live with that. Go for it as long as you won't go into debt of owning one!

[0.18x] Made the plunge with this lens and I have no regrets. It's mind-boggling what it can do, from macro style shots to portraits to landscapes and astro-photography. Combine this lens with a Canon and you have a fine piece of heavy photographic weaponry on your hands.I like the fact that it's heavy, but it actually makes my 5D Mark IV look tiny, so I think it will be better to pair this with a 1DX II eventually. A couple of shots below, one out of the box and another up in the Himalayas, shot at F2.5, 4000ISO, 15 seconds. Still learning how to use this thing, but off to a good start and I'm seeing many years of enjoyment yet to come with this lens. Unfortunately I can't upload these photos because BH site keeps timing out on me, but

[95 mm (Front)] I purchased this lens with the idea of minimizing post production work on my photographs. I spent hours of research and found that the expert consensus was that the Zeiss Otus 28mm f/1.4 ZF.2 lens is possibly one of the finest to date. Since I have purchased it, I have used it on my Nikon D 850 extensively. My experience has been that It does require attention to detail in shooting, but it has never ceased to amaze me in its sharpness and color rendering. This is my second purchase of a new Zeiss lens. I'm extremely pleased with this lens.

[f/16] This is my 3rd Zeiss, 2nd Otus lens (have the 85mm Otus, 135mm APO Sonnar). I have been converting from my Nikon primes to Zeiss over the past two years because of the color quality, sharpness, and amazing build. I ordered the 28mm Otus yesterday, received it today, and took the attached image a couple hours later. Handheld, absolutely no post production done - NEF to JPEG image from a D4s in the weed patch behind my Minnesota cabin. I am excited to see what this lens can do, given the out of the box quality already seen.

[Manual Focus] This is a beautiful lens. I also have the Milvus 25mm f/1.4 ZE. The 25mm is lighter, and probably a little sharper on the edge, but the Otus 28mm delivers much more inspiring color, like the Otus 50mm f/1.4.

It feels harder to focus than the 25mm, probably due to its weight and size.

[Full-Frame] This lens is a landscape and astroscape photographers dream lens. Coma at f1.4 very minimal for stars, see my image shot at f1.4 ISO 1600 10sec shutter. Vignettes more than my Otus 55mm but can be corrected, I would reduce half a star for this. Shooting into the sun does not produce flare like my other wide angle lenses but it has very minimal flare. See attached image. With this image I went through the pano in seconds because I don't have to shoot extra images with finger covering the sun for flare. It is heavy, bulky but for now with the results I'm getting I can live with that. If you have money to buy go for it. If you want to try for night photography or landscapes go for it.

[0.18x] I have owned many cameras and lenses over 50+ years and use Leica and Phase One now but this lens on my SONY A7Riv produces incredible sharpness and resolution and Panos that competes with my medium format. Build quality second to none by any lens in the world.
You can use wide-open with minimal distortions. I have all 4 OTUS lenses all equally excellent.