Sigma 401306 24 mm f/1.4 DG Art Lens for Nikon Mount , Black

Great lens with very good price. However you need to buy it with the dock because you have calibrate it for the good results. Mine had a major back focus problem, but corrected it with the dock.So, DO NOT think to buy this lens without the dock.After you calibrate it, this is one of the best 24mm lenses out there. If this lens had a Zeiss/Nikon/Canon brand on it, it would not cost less than 1500 pound.

Produces incredibly sharp photos. Very happy with the results.Only negative point is I had trouble with inaccurate focus when using large apertures. I was able to improve this by using fine tuning on my camera.

Not as outright sharp as my Sigma 35mm Art lens but way better than my Nikon 24-70 f/2.8 - less distortion and a noticable bump in IQ even when used wide open....the extra stops of light really help when shooting in low light. My sample front focussed quite heavily at short distance but the USB dock sorted it with about 15 minutes of trial and error. Highly recommended

I have had a lot of lenses, and with time, I just keep 3 for my D800: One of those is this Sigma 24/1,4. The two others are the new Nikon 300/4 and the traditional Nikon 105 macro, but with this 24 art, sigma is to my point of view at the same level as Nikon, and much less expensive.

I use this in nightclubs paired with the Nikon D750 and my images just come out so sharp!

perfect quality!

Lens worked perfectly, needed some focus calibration as expected. Delivered sooner than expected.Thanks mate

The new 24/1.4 shares all the characteristics that mark out the existing members of the Sigma Art line: it's extremely sharp and there's hardly any CA or vignetting apart from at the widest apertures. Stop down to f/2.8 and it's as good as anything on the market, and certainly better than the equivalents from Canikon which it undercuts considerably on price. Sharpness and correction of aberrations are particularly noteworthy; it's a bit wishy-washy wide open although by no means bad, but even at f/2, it's incredibly sharp across the frame on my D810. By f/4 you'd really have your work cut out for you to find a flaw.All is not rosy in the Sigma Art garden, however. I fine-tuned the AF, but it's so inconsistent that it was a bit of a judgement call where to set it. (Like most prime lenses, it seemed to be tending to backfocus, but the extent of it varied shot-to-shot.) It should be noted that Nikon's own lenses focus inconsistently too using the camera's PDAF module, and I'm increasingly inclined to think that the system just isn't good enough for >16MP cameras. Nonetheless, I've shot a lot of gear over the past few years and I would have to say that Sigma's AF performance is significantly worse than Canikon's; it's fast, but very inconsistent and inaccurate. Even using contrast detect in live view, it's rarely spot on. So, to exploit the lens's exceptional sharpness, you need to focus manually using the camera's magnified live view which is a slow process and necessitates a tripod.The other typical grumbles are the lack of weather sealing and the weight, although with regard to the latter, that's just how it is: you can either have under-designed lenses that use less glass and rely on software to control aberrations, or you can have optical correction and thus a big heavy lens. My preference would be for a well corrected slower lens: f/2.8 is plenty bright enough on a modern full frame DSLR, and even at 24mm, the DOF is very shallow at such an aperture. Optical correction and light weight would then become a physical possibility, but I suppose enthusiasts' taste for the 'wall of bokeh' has pushed the market towards ever brighter and heavier lenses.To sum up then, the lens is optically excellent, very well made, and great value. However, tread carefully if you don't use a tripod or don't like focusing manually. It doesn't shine using PDAF, and you'd probably be better off with a cheaper prime or one of your camera manufacturer's zoom lenses if you tend to shoot handheld. Zoom lenses are usually stabilised too.