Excerpt: Incredibly sharp out to the corners, great contrast. A far superior lens to any of Nikon's equivalent or even close focal length lenses. I have the Nikon 16-35mm F4 VR zoom and it is very sharp, though not so much as this lens. I also tend to use very little in between wide 16 or 18 and then 35mm so I am happy with this lens and a Nikon 35mm F2 - together they weigh less and take up less space in my bag than the one 16-35mm zoom.
Pros: Consistent Output, Durable, Easily Interchangeable, Rugged, Strong Construction
Summary: I've used this lens a few times with night landscapes. I feel i got a really good deal on it. The details are incredibly sharp which why i chose Zeiss. An excellent lens for serious landscape photography.
Excerpt: Overall, it is a solid-built lens from Zeiss. Feeling tough holding in hand. I don't shoot large aperture with this lens because it's for landscapes, so the f/3.5 is OK for me. The image quality turns out pretty good as expected.
Excerpt: I love using Zeiss lenses on my Nikon. Who needs autofocus?!? This is a heavy lens because it is so solid. Focus is smooth. Aperature ring snaps ever half stop. Images are sharp. Wish it was faster, but you can't have everything.
Pros: Consistent Output, Durable, Rugged, Sharp, Strong Construction
Excerpt: Great wide angle lens. Manual focus is ok but I still prefer Autofocus on longer focal lengths. I was going to buy the Zeiss Distagon 21 f2.8 but already own the Nikor 24-70 f2.8 and decided the focal length of the 21 was too near the 24-70. Glad I did get this 18mm. IMHO its better than the 17-35 f2.8 (another great zoom lens) at 18mm. I traded in the 17-35 mainly to save weight in my camera bag. Trade offs!
Summary: I also have the 15mm from Zeiss, which is much more expensive, but I'm just as happy with this lens, the image quality and sharpness is amazing, lighter, and 1/3 the price. It also works well with existing filter systems, where the 15mm does not. Highly recommended!
Summary: This is lens is what I expected when investing in a wide angle ! Sharp from every corner this is a very precise and quality kind of tool. is made for Pro-Photography. It is not cheap but is worth every cent. Carl Zeiss ia a brand apart when you decide going for quality optics.