Ãâ· Sigma 1835mm F18 Dc Hsm Art Lens for Canon Ef
This is an in-depth review of the Sigma 18-35mm f/1.8 DC HSM Art lens, earth's showtime constant f/1.viii zoom lens for DSLR cameras that was appear in Apr of 2013. Despite the recent trend of manufacturers to motility their customer base to full-frame format, Sigma took a bold movement and announced the professional-grade Sigma eighteen-35mm f/i.8 Art for DX/APS-C format only. With a focal range equivalent to 27mm-52.5mm in 35mm format, the lens provides a good range to work with for a variety of different needs and applications. And with its fast abiding aperture of f/i.8, the Sigma eighteen-35mm opens upwardly opportunities to shoot in low-light situations, something that was previously only possible with fast aperture prime lenses. Lastly, Sigma's pricing of $799 MSRP for the lens made it the top choice in terms of value when compared to pro-form lenses such as the Nikon 17-55mm f/2.8G DX, which sells for almost twice equally much and does non offer the same depression-lite advantages.
The Sigma 18-35mm f/1.8 DC HCM is a technological marvel, considering it is the starting time zoom lens in history with such a wide / fast aperture. On top of that, Sigma used many high-finish features and components that are unremarkably only available on pro-form full-frame lenses. First, the lens comes with a hypersonic motor (HSM), which provides silent and fast autofocus.
2d, the lens has a very complex optical formula that consists of a total of 17 lens elements in 12 groups, with four aspherical and 5 low-dispersion elements. Tertiary, it has a metal mount and a thermally stable composite butt, which offers greater elasticity than polycarbonate and offers minimal thermal shrinkage with exceptional hardness, something Sigma has but recently started providing on its new generation lenses. And lastly, existence an "Art" series lens, it is fully compatible with Sigma'south USB dock that allows micro-adjusting autofocus parameters.
Sigma 18-35mm f/1.8 DC HSM Art Specifications
- Available for Mounts: Sigma, Sony, Nikon, Pentax, Canon
- Focal length: 18-35mm
- Maximum discontinuity: f/1.8
- Minimum discontinuity: f/sixteen
- Lens construction: 17 elements in 12 groups
- Angle of view: 76.five° – 44.two°
- Closest focusing distance: 28cm/11.0in.
- Maximum reproduction ratio: ane:four.3
- No. of diaphragm blades: 9 (rounded)
- Filter/attachment size: 72mm
- Diameter x length: 78mm x 121mm / 3.1in. x iv.8in.
- Weight: 810g/28.six oz.
Other technical information, including manufacturer-provided MTF nautical chart can be found in the Sigma 18-35mm f/1.eight DC HSM page from our lens database.
Lens Handling and Build
Sigma has put a lot of endeavour into making the new generation lenses attractive both in terms of design and function, and the Sigma xviii-35mm is not an exception. Similar to the Sigma 35mm f/1.4 Fine art, the lens gives a unlike sense of quality to it when compared to previous generation Sigma lenses. The craftsmanship of the lens is indeed excellent. Starting from the rugged contumely mountain that smoothly connects with the metal barrel, to the smooth rubber focus band in the front, you won't get a feeling of a cheap lens that nosotros are so accustomed to when normally dealing with APS-C/DX lenses. The metal barrel is made of a special Thermally Stable Composite fabric, which offers exceptional hardness, better elasticity than polycarbonate and minimal thermal shrinkage. This basically means that the lens should easily withstand extremely hot and cold temperatures without harm or potential functioning deposition. While I could not examination the lens in hot temperatures, I did take it out during a very cold forenoon when the temperatures peaked -5F (some of the snowfall images in the review were taken during that forenoon). The lens performed very well during and after the shoot, autofocus continued to role without any problems, and both zoom and focus rings operated smoothly without getting stuck. In short, the build quality of the Sigma xviii-35mm is outstanding. My just gripe is lack of a rubber gasket on the mountain to forestall grit and other debris from getting into the photographic camera. For some reason, Sigma never includes one on its lenses, which is unfortunate.
The handling of the lens is also superb, although that tin depend on whether yous are comfortable with a reverse rotation of the focus band. The zoom ring follows like clock-wise rotation from short to long focal lengths every bit Nikon's DX lenses, but its focus ring is reversed. So to move from close focus to infinity, you would accept to rotate the focus ring counter clock-wise. Bated from this ergonomic difference, I have non seen any serious issues with handling (and Canon users might adopt how the focus band works, considering Canon lenses piece of work the same mode). Yes, the lens is indeed quite heavy at 810 grams, but because its fast speed, metal construction and a total of 17 lens elements, I doubt Sigma could have fabricated information technology lighter. That said, it certainly does feel front-heavy when mounted on lightweight DX cameras like Nikon D5300. At the same fourth dimension, its long barrel really makes it easier to balance it out on lightweight camera bodies when it is hand-held. The zoom ring is smooth and has some nice resistance to it, while the focus ring is likewise very smoothen, albeit with a little less resistance. Similar to many Nikkor lenses, there is a switch on the side of the barrel that allows to move the lens from autofocus to manual focus operation. The middle portion of the barrel (which is nicely threaded underneath for improve grip), along with the front role and the filter thread are plastic. Sigma probably decided to use the lighter cloth to decrease the weight of the lens. The supplied hood is also plastic and tin be mounted regularly, or in opposite direction to save camera bag space. Once mounted on the lens, it stays secure and does non wobble.
Use on Full-Frame
Some DX / APS-C lenses are known to work quite well on full-frame cameras, with some vignetting that can be removed in the corners (the Nikon 35mm f/1.8G is a skilful example of such lens). The Sigma 18-35mm f/1.8G is not a proficient candidate to exist mounted on a total-frame camera, especially at the shortest end of the focal length. Take a look at how the image turned out when I shot information technology at 18mm on the Nikon D800E:
When I saw the above, I inverse the setting on my Nikon D800E to switch to DX crop mode when the lens was mounted on information technology.
Autofocus Performance and Accuracy
Thanks to the fast hypersonic motor, the lens acquires focus apace and silently. I compared the AF speed of the Sigma 18-35mm f/1.viii to the Nikon 50mm f/i.8G and while the Nikon seemed to be a tad faster, it was definitely noisier. Also, it is important to note that dissimilar older lenses that required cameras to have a built-in autofocus motor, the Sigma eighteen-35mm has an integrated focus motor, which means that autofocus will work on entry-level cameras like Nikon D3300 and D5300. With lenses with built-in focus motors, y'all practice not have to worry virtually buying a college-cease DSLR just to be able to employ autofocus anymore.
In terms of autofocus accurateness, the lens behaved rather unpredictably at times. While most of the images were in focus, sometimes the lens would simply refuse to acquire correct focus on both the Nikon D5300 and the Nikon D800E (in DX crop mode). And when the light conditions were less than platonic pressing the AF-ON button repeatedly to force the lens to reacquire focus would not help either. Occasionally, I would extend my hand at a close distance, force the lens to larn focus, then refocus on the subject field. I don't know if this has to exercise with Nikon firmware non playing well with Sigma, or if information technology is Sigma'southward AF motor that is unreliable, just it sure was disappointing to accept a shot only to find out that the lens focused on the background. Utilizing the eye focus point and using the focus and recompose technique in low-light and high-contrast situations seemed to yield improve results.
Source: https://photographylife.com/reviews/sigma-18-35mm-f1-8
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