[0.675 lb] Been use for Northern light, Perfect to use

[0.675 lb] Extremely wide angle lens. If you don't want a fish-eye but want a really wide-angle lens, for the price this lens really hits the mark. Really sharp at 12mm (gets softer as you zoom in). It is heavy, but really a great versatile lens. I recommend it for sure.

[0.675 lb] I have owned the Nikon 14-24mm, 18-35mm, 16-35mm and Tamron 15-30mm, this lens beats them all! It is very sharp at f4 to f10 at 12-18mm but then softens a bit from 18-24mm. Distortion, CA and vignetting are all controlled very well. The lens is well built and balances on my D810 nicely. This lens will blow you away when taking architectural interior shots at 12mm f4 most everything is straight and in focus and same goes for landscape photography, you wont be disappointed.

[0.675 lb] I wanted a good general purpose lens for an upcoming trip with lots of landscape and cityscape opportunities.

[0.675 lb] I was looking for recomendation on what wide angles where the best, but good pricing at the same time. End it up with this, trying for the first time, great quality, beautiful lens, not that heavy if you are use to heavy lenses.

[0.675 lb] Amazing experience from the buying to receiving. Easy checkout and fast shipping. Great product too.

[0.675 lb] Quality lens at an affordable price.

[0.675 lb] I have been using the generation one Sigma 12-24mm lens for wide landscapes and architectual shots for many years. The older lens was sharp in the center but soft at the edges and corners even when stopped down. The older lens was at its worst in the 12-15mm range, right where you needed it most. I am very impressed with the sharpness of the new Art version, especially at 12mm wide open. It is impressively sharp right to the edge of the frame and even deep into the corners. Not tack sharp like the center, but very very sharp for the edges of a super wide lens. If you own one of the older Sigma lenses and are thinking about upgrading, don't wait. The new lens is a huge improvement over the older versions in every respect, including build quality, and image quality. If you consider cost as a downside to the new lens, consider the Canon 11-24mm lens. The Sigma is about half that price, so perhaps the Sigma is a bargan. In the DPREVIEW review of the Sigma Art lens they said at 12 mm it is very close to the Canon in terms of sharpness and beats the Canon in terms of vignetting, chromatic aberration (CA) and distortion. The DPREVIEW review of the Sigma lens was not as good in the 16-24mm end of the range. However, the images I have taken with the lens with my 5Ds look pretty darn good, at 24mm. At that focal length, the Sigma beats my Canon 24-105mm L lens in terms of sharpness. At 12 mm The Sigma is approaching my Canon 70-200mm f/2.8 IS II lens in terms of sharpness. If you are familiar with that lens, you will know that is impressive. For my purposes, the Sigma is a winner, especially when you consider price. That is why I gave it a 5 star rating.

[0.675 lb] Ultra sharp

[0.675 lb] I should have bought into the 12-14mm years ago but stuck to 16mm (16-35 L 2.8). This Sigma is a monster sized/weight lens that feels like a tank artillery shell, but this is good. I'm not buying into this new smaller, more petite trend. I'm sticking to my DSLR which actually works better for my line of work, all photo and no video.