The Sigma 30mm ƒ/1.4 DC Art is yet another lens lớn undergo Sigma"s Global Vision makeover. An updated version of the popular Sigma 30mm ƒ/1.4 EX DC HSM, the new version gets an "Art" Series designation, along with updated construction using Sigma"s Thermally Stable Composite Material, new optical layout và compatibility with Sigma"s USB Dock configuration và adjustment system.
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As expected, the Sigma 30mm ƒ/1.4 DC Art comes in a variety of flavors for APS-C cameras including Canon, Nikon and Sigma camera mounts. The previous mã sản phẩm also came in Sony Alpha and Pentax mounts, but these are currently not available for the new version.
The new Sigma 30mm prime lens takes 62mm filters lượt thích its predecessor does, and weighs just slightly more. And lượt thích most Sigma lenses, this one is available for a nice, budget-friendly price of around $499 and ships with front & rear caps, a lens hood và a soft case.
SharpnessOverall, the Sigma 30mm ƒ/1.4 DC Art produces very sharp images. Wide mở cửa at ƒ/1.4, images are a little soft except for in the dead center of the frame, however, when compared to its predecessor, the new Art-Series mã sản phẩm shows vastly improved performance at max aperture. Stopping down to ƒ/2.8 shows a significant increase in sharpness, & it stays very sharp throughout the aperture range with only minor diffraction softness at ƒ/16.
Chromatic AberrationChromatic aberration is not really a significant issue with this lens, & it looks fairly similar khổng lồ the older model in this regard, if only slightly worse. At ƒ/1.4, both models averaged around 300ths of a percent of frame height, và while the older model averaged around a more or less constant value, the new version shows an increase in CA as you stop down to lớn just around 600ths of a percent at ƒ/16.
Shading (""Vignetting"")Unlike CA, vignetting has been much improved in this new model compared lớn the older one. While both models displayed about half of a stop of light falloff wide open, the new model shows a sharp decrease to lớn nearly zero light loss by ƒ/2.8, & remains at that cấp độ throughout the rest of the aperture values. The older model, on the other hand, showed a slow, steady decrease in CA, but even by ƒ/8, the older version had more vignetting than the new one does at ƒ/2.8.
DistortionThe Sigma 30mm ƒ/1.4 DC Art has a moderate amount of barrel distortion at 0.5% at the corners, và averages around 0.25%, which is almost identical khổng lồ the older mã sản phẩm lens.
Autofocus OperationThe Sigma 30mm ƒ/1.4 DC Art is a very good performer in terms of autofocus. The electrical Hyper Sonic Motor focusing system is very fast, accurate & quiet, taking less than a second to lớn move through its full focus range. The HSM system also allows for full-manual focus override, but the lens also has a mechanical manual focus switch on the side of the barrel.
MacroWith a minimum focusing distance just shy of of a foot at 11.8 inches, & a maximum magnification ratio of just 1:6.8, the Sigma 30mm ƒ/1.4 DC Art isn"t a great macro performer.
Build quality and HandlingThe Sigma 30mm ƒ/1.4 DC Art is a nice, solid lens with a good heft, but not overly heavy or bulky. By itself, the lens weighs 423.5g (14.9oz), and the lens hood adds another 38.4g (1.4oz). Size-wise, the new lens is 2.5 inches wide, & just shy of 3 inches long. The included lens hood adds about 1.5 inches of additional length. The bayonet-style hood also adds a bit of extra width to lớn the lens.
The barrel is constructed out of Sigma"s new Thermally Stable Composite Material, which has been used in other Global Vision lenses such as the Sigma 120-300mm ƒ/2.8 OS sport lens. The material feels very much lượt thích metal và has a smooth, đen nhám finish. The lens hood, however, has a similar matte black finish, but is made of a sturdy, polycarbonate plastic.
The optical construction has also received an update with 9 elements in 7 groups with one aspherical element. The older model had 7 elements in 7 group with a hybrid aspherical lens và two Special Low Dispersion elements. The aperture diaphragm has also been improved with a new rounded, 9-bladed thiết kế over the 8-bladed older model.
The focus ring sits right at the front of the lens and is about half an inch wide, with about 75% being covered with a deeply-ridged rubber grip. The focus ring is very smooth to rotate, but not so loose that a slight brush against it would throw off your focus. There are soft stops for minimum & infinity focus distances, but the ring will still rotate beyond these points. There are also a row of sculpted ridges along the bottom side of the lens"s mid-section for an easy grip on the barrel. Other cosmetic features include a focus window with distance markings, as well as a physical switch khổng lồ toggle AF & manual focus.
Alternatives
Canon EF 35mm ƒ/1.4L USM ~ $1,479On the Canon side of things, there isn"t an exact direct competitor, as Canon doesn"t make a 30mm prime lens for APS-C cameras. The Canon 35mm ƒ/1.4L lens has the same fast, ƒ/1.4 aperture with an approximately 56mm FOV on an APS-C camera. Based on our tests, it actually shows similar sharpness lớn the Sigma on a sub-frame camera, but with better distortion control & slightly improved vignetting performance. The big downside is that it"s nearly three times the price.
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Canon EF 35mm ƒ/2 IS USM ~ $549There"s also the Canon 35mm ƒ/2 IS, which shows similar sharpness at ƒ/2 và better distortion and CA control on a sub-frame camera, but you miss out on the ƒ/1.4 aperture. However, the included Image Stabilization is a nice bonus for low-light still shooting and video recording. It"s also about $100 more expensive than the Sigma, but the Canon can also be used on a full-frame camera.
Canon EF 28mm ƒ/1.8 USM ~ $449A third option for Canon users is the Canon EF 28mm ƒ/1.8 USM, which has a more similar field of view on a sub-frame camera khổng lồ the Sigma 30mm lens at approximately 44.8mm. At the wider apertures, such as ƒ/4 & bigger, the Sigma 30mm has better sharpness và shows significantly less CA. The Canon is a tad cheaper however, but doesn"t have as wide an aperture.
Nikon 35mm ƒ/1.8G DX ~ $197In the Nikon camp, there is a fast DX-format prime, the Nikon 35mm ƒ/1.8G DX lens. The Sigma has slightly better image sharpness than the Nikon, as well as better vignetting control. You thua thảm two thirds of a stop with the maximum ƒ/1.8 aperture, but the Nikon more than makes up for the differerence in performance with a much lower price around $200!
ConclusionOverall, the new Sigma 30mm ƒ/1.4 DC Art is a fantastic APS-C fast prime lens that delivers great image unique with nice, sharp images, low vignetting và only slight barrel distortion. While CA is bit more pronounced versus its predecessor, overall it"s a very minor issue.
The cosmetic as well as optical configuration are the biggest changes. The new Global Vision redesign gives this lens a very high unique build, which feels great in the hand. There"s now more glass inside the barrel & the improved rounded, 9-blade aperture should make for better bokeh, especially when shooting wide xuất hiện at ƒ/1.4.
Like other Sigma lenses, price is another big factor lớn their appeal, and even more so when you factor in their improved build unique nowadays with their Global Vision designs. At around $500, this lens is a very solid performer that won"t put a big dent in your wallet. If you"re an APS-C shooter in need of a great low-light lens or a serious "bokeh-monster," then the Sigma 30mm ƒ/1.4 DC Art lens should be at the vị trí cao nhất of your list.
Also, kiểm tra out this Sigma overview clip for more information on the Sigma 30mm ƒ/1.4 DC "A" lens.
Product Photos
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Sample Photos
Check out a selection of real-world sample images over on our Flickr page.
The VFA target should give you a good idea of sharpness in the center và corners, as well as some idea of the extent of barrel or pincushion distortion & chromatic aberration, while the Still Life subject may help in judging contrast and color. We shoot both images using the mặc định JPEG settings và manual white balance of our chạy thử bodies, so the images should be quite consistent from lens lớn lens.
As appropriate, we shoot these with both full-frame and sub-frame bodies, at a range of focal lengths, và at both maximum aperture và ƒ/8. For the ""VFA"" target (the viewfinder accuracy target from Imaging Resource), we also provide sample crops from the center & upper-left corner of each shot, so you can quickly get a sense of relative sharpness, without having to download and inspect the full-res images. Khổng lồ avoid space limitations with the layout of our reviews pages, indexes khổng lồ the kiểm tra shots launch in separate windows.
