The Sigma 35mm f/1.2 DG DN Art released by Sigma in the third quarter of 2020 can be said to be a new brand, because it is its first Art lens with a maximum aperture of f/1.2, with 3 SLDs (special low Dispersive lens) and 3 aspherical lenses, the resolution is enough to cope with the 50MP sensor, the lens body is equipped with a physical aperture ring and stepless aperture adjustment, the number of aperture blades is as many as 11 comparable to GM lenses, and the point is that it also supports Sony E-Mount The lens compensation function is excellent; the lens body is also quite heavy to 1,090 grams, and the length reaches 136.2mm. The Bigma in the mouth of the players can be said to be worthy of its name!

●Sigma 35mm f/1.2 DG DN Art Appearance and Features Introduction

The Sigma 35mm f/1.2 DG DN Art comes with front and rear caps and a lens hood. In addition, it also provides a textured and protective lens bag with a strap. Most of the 35mm prime lenses we are familiar with in the past have a maximum aperture of f/1.4 or f/1.8. For the FE-Mount original lens of the same level, only the Distagon T* FE 35mm F1.4 ZA can be compared. , this Cai head is priced at NT$44,980, while the Sigma 35mm f/1.2 DG DN Art has a 2/3-stop larger aperture and is equipped with more solid optics. The Sony f/1.4 ZA is still cheap at NT$43,500. If your full-frame E-Mount body still lacks the 35mm focal length, and you want to experience the bokeh charm of f/1.2, the Sigma 35mm f/1.2 DG DN Art really has it. A certain attraction!

Formal hood

Reverse hood

Remove the hood button

inner edge of hood

The lotus-shaped hood attached to the mirror is LH878-02. The material of this hood is quite special. The outer upper edge of the hood is painted with matte black, and the lower edge of the hood is made of rubber-like material. Increase the feel of disassembly and assembly, but it is easy to be contaminated with dander, and it will stick to a pile after cleaning. This should be no solution, and I will worry about whether the rubber will deteriorate over time; the hood has a release button , You need to press and unlock to remove the hood, which is also a common design for high-end lenses. Finally, the inner edge of the hood is represented by matting threads, thereby reducing unnecessary reflections of light.

The front jade of the Sigma 35mm f/1.2 DG DN Art is coated with water and oil repellent coating, the optical structure is 12 groups of 17 plus an 82mm aperture, and the metal lens body of the 35mm f/1.2 Art makes its total weight Coming to 1,090 grams, the volume part is 87.8 × 136.2 (mm).

The special lens material is quite solid, including 3 SLD (special low dispersion lens) and 3 aspherical lens, while taking advantage of the short flange distance of the mirrorless camera, the performance of deformation control and edge loss is strengthened. It is the original factory that emphasizes that the resolution of the 35mm f/1.2 Art is sufficient to cope with the 50MP sensor, so the Sony A7R III is also specially selected for the fuselage this time. The closest focusing distance is 30 cm, and the best magnification is 0.2x, and this performance can only be regarded as quite satisfactory.

Sony's flagship G Master master AOD4146 model in recent years">AOD4146 model">AOD4146 model">AOD4146 model">AOD4146 model">AOD4146 model">AOD4146 model">AOD4146 model">AOD4146 model">AOD4146 lens, the main feature One of them is the 11 aperture blades. With multiple aperture blades, the out-of-focus bokeh is soft, and the light spot performance after reducing the aperture is also more pleasing. The Sigma 35mm f/1.2 Art does the same, hoping to bring it to portrait photography. Better camera experience for players.

The lens body of the Sigma 35mm f/1.2 Art is almost all made of metal as long as it can be touched, and the overall texture is very good. I think this is one of the main reasons why its weight exceeds 1000g; the lens body is equipped with a manual focus ring and aperture. The aperture range on the aperture ring can be adjusted from f/1.2 to f/16 in 1/3 stops, and the aperture value after cutting to "A" is controlled by the body dial.

The Sigma 35mm f/1.2 Art is similar to the GM mirror in that it also has a built-in click switch. When the click is OFF, there will be no sound when the aperture ring is adjusted, and it can also operate the stepless aperture. Video homework helps a lot.

There is also a switch button for automatic and manual focus on the side of the lens body, and the "AFL" auto focus lock button, which is more common on telephoto lenses, mainly used in conjunction with AF-C continuous auto focus, although in The practicality of the Sigma 35mm f/1.2 Art is not high, but users can make good use of the custom function of the E-Mount camera. In the custom button menu, the related functions of the "AFL" button can be specified. If you want to set it to "Auto" Focus area, eye control focus, style setting"... and so on are all no problem!

metal mirror tail

Dust-proof and drip-proof rubber ring

The metal mirror tail is also the standard equipment of this Art lens. Of course, you can also see the rubber ring that is dust-proof and drip-proof. If you often work in harsh environments, it is recommended to check the condition of the rubber ring regularly. If there is any damage If so, it is recommended to return to the original factory for replacement.

With A7R III body

sturdy mirror

Top ratio

The Sony A7R III plus battery and memory card weighs about 657 grams, and the 1,090 grams of the Sigma 35mm f/1.2 Art lens brings the total weight to 1,747 grams. To be honest, this weight is really amazing! Without the assistance of a vertical handle, it will be more difficult to work for a long time, and the stability of one-handed shooting is not high enough, except if you are born with supernatural powers. The picture above is an example of a Sony A7R III with a Sigma 35mm f/1.2 Art. You can compare it for yourself. This size looks almost the same as a 24-70mm f/2.8 lens.

●Autofocus speed (far/close objects)

The Sigma 35mm f/1.2 Art has a built-in large-scale HSM ultrasonic focusing motor. The focusing response of the A7R III can be regarded as sensitive and quiet. However, when focusing on close objects and distant objects in AF-S mode, there is a certain probability that the focus will appear. False focus, that is, it is clearly not in focus but the focus is completed, and the video in the right row of the table below can be seen; if it is in AF-C mode, there will be no similar problems, after all, the shutter is half-pressed at this time. ” is constantly moving, so even if there is a false focus, it is not easy to detect.

●Distortion suppression test (lens compensation: ON/OFF)

The Sigma 35mm f/1.2 Art fully supports the "Lens Compensation" function of Sony E-Mount cameras, which can compensate for the deficiencies of optical technology through digital correction, such as chromatic aberration, edge loss and distortion. The following are the differences before and after the "Lens Compensation" correction. Before the correction, obvious barrel deformation can be seen around the screen, and the horizontal and vertical lines after correction are almost invisible.

●Aperture resolution at all levels (center/edge)

The Sigma 35mm f/1.2 Art is equipped with 3 SLD (special low dispersion lens) and 3 aspherical lenses. Such optical materials can be built with the high expectations of the original factory for this lens. From the MTF chart, it can also be seen. Knowing that its performance has the strength to compete with the GM lens, although the GM lens does not have a 35mm focal length, and the maximum aperture is only f/1.4, but also because of this, the strength of the Sigma 35mm f/1.2 Art should not be underestimated. .

From the actual shooting performance below, at f/1.2, in full frame 4240 -ic/" title="4240 model">4240-ic/" title="4240 model">4240-ic/" title="4240 Model">4240-ic/" title="Model 4240">4240-ic/" title="Model 4240">4240-ic/" title="Model 4240">4240-ic/" title="Model 4240" >4240-ic/" title="4240 model">4240-ic/" title="4240 model">42.4 million high pixel interpretation is quite powerful, whether it is the center or edge of the image, 100% cropped picture They are very solid, but even with the lens compensation function f/1.2 turned on, the problem of edge loss cannot be completely suppressed. It is more obvious at the edge of the image, and the loss of light after f/2 is much improved; it is also worth mentioning that When the aperture is reduced to f/16, there is no sign of significant deterioration in image quality, which is more conducive to slow shutter operations.

●Aperture dispersion suppression performance at all levels (center/edge)

The Sigma 35mm f/1.2 Art is equipped with 3 SLDs (special low dispersion lenses), there is a slight purple fringing when the aperture is opened at f/1.2, and the purple fringing phenomenon can be almost completely suppressed when the aperture is narrowed down to f/2.8, even if There is no lateral chromatic aberration at the edges of the image. If you compare the experience with Canon's new generation RF-Mount f/1.2 lens, such dispersion control performance is already excellent. After all, the price of the Sigma 35mm f/1.2 Art is only NT$43,500, compared to the same f/ 1.2 AF lens, this price is really attractive.

●Anti-flare and starburst performance of apertures at all levels

Equipped with super multi-layer coating technology, the test is equipped with the original hood. The test environment still chooses a subject with high contrast and a point light source. When shooting, try to find an angle with obvious flare to test, from the following groups It can be seen from the figure that the anti-flare performance of f/1.2~f/16 is excellent, especially when the aperture is reduced to f/22, the degree of convergence of the light spot is indeed the level of high-end mirrors.

●The loss of light at the edge of the aperture at all levels

The Sigma 35mm f/1.2 Art supports the "lens compensation" function of the E-Mount camera, which includes "edge loss" correction, and the most common lenses for this are ultra-wide-angle and large-aperture lenses. The following two sets of pictures are respectively It is a comparison of the lens compensation switch. In fact, whether the lens compensation is turned on or not, there will still be a problem of edge loss of light. The difference is only in the severity of the plot. If the lens compensation function is turned on, the problem of edge loss of light is about f /2.8 is completely improved.

●Performance of aperture aperture at all levels

The larger the opening aperture of the lens, the more obvious the aperture eclipse. The Sigma 35mm f/1.2 Art is of course no exception. From the following group pictures, we can see the obvious aperture eclipse at f/1.2, that is, around the image, it looks like a cat's eye or a It is in the shape of a football, but this phenomenon can be improved by reducing the aperture. I use 1/3 EV steps to adjust the aperture, and the aperture erosion can be almost completely improved when it is reduced to f/2.2, but the 35mm f/2.2 The bokeh performance of this focal length and aperture combination is relatively mediocre. If you don’t care about aperture eclipse, especially when there is no “light spot” in the background, you can still use f/1.2 to take pictures!

●Sigma 35mm f/1.2 DG DN Art experience and conclusion

Sigma f/1.2 Art only offers its own L-Mount and E-Mount adapters. It’s a pity that mirrorless users of Canon RF-Mount and Nikon Z-Mount don’t have the chance to buy this high-level Art lens, because RF -Mount's f/1.2 family has two focal lengths, 50mm and 85mm, but there is no plan for 35mm f/1.2 on Roadmap. As for Z-Mount's AF prime lenses, they are currently all f/1.8, 35mm f /1.2S may be something after 2021, and in terms of the pricing of Z-Mount lenses, it is definitely not friendly enough, so why Sigma does not provide these two adapter options is really confusing, I don't know if it is reversed Problems with the project? ! Quite intriguing, on the other hand, Tamron, which belongs to the Japanese lens factory, is much more active.

This time, the Sigma 35mm f/1.2 Art was tested with Sony A7R III throughout the whole process. It is also the fifth lens evaluation with A7R III in the past few months. I would also like to thank Sony for its strong support! However, with the combination of the body and the lens, top-heavy is the fate of the f/1.2 lens, but it can exchange for a more significant sense of space cut that the f/1.4 and f/1.8 lenses cannot do; The 35mm f/1.2 Art large aperture is fully prepared for the chromatic dispersion that will be faced by the large aperture, coupled with the built-in "lens compensation" function of the fuselage, its image performance is completely comparable to that of the GM lens, whether it is resolution, The control of anti-glare and purple fringing can be said to be comprehensive.

The editor personally thinks that the 35mm f/1.2 Art is a bit of a fly in the ointment is its response in AF-S mode. There is a certain chance that false focus will appear, which may be a small regret, but the solution is not without it, if it is If you focus on portrait shooting, it is recommended to use the AF-C + Real-Time Eye AF Tracking function, and with high-speed continuous shooting, you can easily cope with dynamic portraits; if you use single-point focusing like the test example in this article , if there is a false in-focus, just hurry up and press it several times. If you have a good character, you may not encounter it. After all, it is not the original lens of the original factory.