A new era standard change that dare to think and act: Sigma 24-70mm F2.8 DG DN review
This article comes from Jiayou Online
F2.8 large aperture standard zoom lens, for any mount or brand, is of great significance. After all, this type of lens is the focal length most commonly used by professional photographers. After entering the full-frame mirrorless market in 2019, SIGMA released a series of DG DN series lenses newly designed for the short-flange full-frame mirrorless camera with its first full-frame mirrorless camera fp. This includes this A newly released 24-70mm F2.8 DG DN lens. What is the actual performance of this lens? What does it mean for the newly born “Maraisson” alliance L-mount users? What does it mean for Sony E-mount mirrorless camera users? These are all questions we will answer in this evaluation.
Appearance design language , Sigma 24-70mm F2.8 DG DN adopts the family design since entering the Art era, minimalist black and white, very recognizable. The front of the lens is a focusing ring, and the rear of the lens is a zoom ring, which has a good feel in actual use.
In the past SLR era, the Sigma Art series lenses gave people The impression is often that the picture quality is excellent, but the volume and weight control are slightly unrestrained, but after entering the era of full-frame mirrorless, this inherent impression may change.
Compared to Sony FE 24-70mm F2.8 GM, Sigma The 24-70mm F2.8 DG DN is almost one size smaller and the weight is also tens of grams lighter. It would be inappropriate to call Sigma a “fitness equipment factory”.
Sigma 24-70mm F2.8 DG DN is available at 24mm Fully retracted into the lens barrel, the 70mm end extends the longest, but the overall balance can still be maintained.
There are manual autofocus switch and A function key, which can be customized on Sony’s body. It is worth mentioning that this Sigma 24-70mm F2.8 DG DN can achieve full-featured support for Sony’s micro-single, including various eye focusing, and its focusing performance does not feel different from the original factory.
The other side of the lens, Sigma 24-70mm F2.8 DG DN has a lock button, which can lock the lens barrel at the 24mm end to prevent damage to the lens caused by bumps during the journey. It is worth mentioning that the lock button of this lens is not intentional: it can be unlocked by turning the zoom ring a little harder, which is convenient for the photographer to enter the shooting state at any time without being embarrassed by forgetting to unlock the lock. For 24-70mm F2.8, which is often used in news reports and humanities documentary capture lens, it is obviously a very intimate design.
In addition to the logo made in Japan, the end of the lens is also marked The closest focusing distance of the lens: 0.18m at the wide-angle end and 0.38m at the telephoto end. There is a certain close-up advantage at the wide-angle end, which can achieve the special blur effect of wide-angle and large aperture.
Of course, as a professional lens, Sigma does not Some reservations on the materials used. The all-metal mount has good durability, and the waterproof and dustproof rubber ring allows this lens to work normally under harsh conditions.
Sigma 24- The 70mm F2.8 DG DN lens adopts a drip-proof and dust-proof seal design
The measured Sigma 24-70mm F2.8 DG DN lens can still work normally in snowy weather
The front lens group, Sigma 24-70mm F2.8 DG DN adopts 82mm diameter, which belongs to the current mainstream specification.
Sigma 24-70mm F2.8 DG DN comes with a lens hood , The petal-shaped design is very harmonious with the lens.
There is a lock button on the hood, which can effectively prevent Collision causes accidental loosening.
The inside of the hood is equipped with a matt thread, which can effectively prevent The incident light path affects the image quality performance.
In addition, Sigma 24-70mm F2.8 DG DN lens hood Support reverse buckle, convenient to carry and reduce the space occupied in the bag.
Sigma 24- 70mm F2.8 DG DN with Sony full-frame micro-single
in During the whole trial process, Sigma 24-70mm F2.8 DG DN left a good impression on me. It has an excellent grip and a good balance with the body. With good focusing performance, it is almost in use. Can not feel the difference with the original lens.
Sharpness performance evaluation
In terms of optical design, Sigma 24-70mm F2.8 DG DN lens uses a variety of special low-dispersion glass, which makes full use of the advantages of mirrorless camera optical design. At the same time, 6 fluorite-grade low-dispersion lenses, 2 special low-dispersion lenses, and 3 aspheric lenses are used. In addition to super multi-layer coatings, the product also uses nanoporous coatings to eliminate the influence of strong incident light under backlight conditions.
Sigma 24- 70mm F2.8 DG DN optical design drawing
In terms of sharpness performance, we still use the real shot JPEG straight out + slice method to test. They are the 24mm end and the 70mm end, respectively. Take the 100% magnified slices at various apertures as follows. The slice positions are shown in the red frame in the figure. The camera used is a 42.4 million pixel Sony Alpha 7R Mark III. First is the 24mm end, then the 70mm end.
Sigma 24- The sharpness performance of 70mm F2.8 DG DN at 24mm end
the sharpness performance of Sigma 24-70mm F2.8 DG DN at the 70mm end
From the results, whether it is at the 24mm end of Sigma 24-70mm F2.8 DG DN Still at the 70mm end, the sharpness performance in the center is very good, even with the full aperture, the sharpness is completely OK. Of course, a proper narrowing of the aperture can get better performance; in terms of edge sharpness, Sigma 24-70mm F2.8 The performance of the DG DN lens is not as eye-catching as the center. The full-open aperture is a bit softer, but as long as you close one or two stops, you can get good picture quality.
Combined with the specific use scene of this lens, we think this kind of performance is quite reasonable: after all, for most scenes with large aperture, the edges of the picture are often in the range of blur. At this time, the performance of edge sharpness is not just necessary; for scenery subject shooting that emphasizes edge sharpness, this lens can fully meet the corresponding needs when using a small aperture. On the whole, in terms of sharpness performance, Sigma 24-70mm F2.8 DG DN is definitely a lens that users can use with confidence.
distortion performance evaluation
Sigma 24-70mm F2.8 DG DN distortion performance at 24mm end
Sigma 24-70mm F2.8 DG DN distortion performance at 70mm end
Distortion performance, when the internal correction is turned on , Sigma 24-70mm F2.8 DG DN can completely solve the problem. Considering that it is a common practice to correct distortion through in-camera files, it has no substantial impact on standard zoom lenses, and it is obviously helpful to control the volume of the lens and improve the optical quality. Consumers don’t need to care and open the in-camera steadily. Just correct it.
Vignette performance evaluation
Sigma 24-70mm F2.8 DG DN at the 24mm end of the full-open aperture performance of vignetting
Sigma 24-70mm F2.8 DG DN at the 24mm end full-open aperture performance of the vignetting
Sigma 24-70mm F2.8 DG DN Vignetting performance at 70mm full aperture
The vignetting performance of Sigma 24-70mm F2.8 DG DN at the 70mm end full aperture is limited by its compact size, Sigma 24-70mm F2 in terms of vignetting performance.
vignetting performance .8 DG DN showed obvious vignetting without opening the lens correction. Of course, it can be completely solved by turning on the correction like distortion. Considering that vignetting and distortion are arguably the easiest problems to be solved in the later stage in the digital age, everyone shouldn’t care too much. Moreover, in many humanistic portrait photography, the photographer prefers to keep a certain vignetting to set off the main body. Different people have different opinions in this regard.
Dispersion performance evaluation
Sigma 24-70mm F2.8 DG DN at the 24mm end full aperture dispersion performance
SIGMA 24-70mm F2.8 DG DN Dispersion performance at full aperture at 70mm end
Sigma 24-70mm F2.8 DG DN at 24mm end Axial dispersion performance of aperture opening
Sigma 24-70mm F2.8 DG DN’s dispersion performance at full aperture at 70mm
dispersion performance, in addition to the obvious out-of-focus dispersion at the telephoto end, Sigma 24 The dispersion control performance of -70mm F2.8 DG DN should be said to be remarkable, even in high-contrast scenes, there is no obvious dispersion. Turn on the internal calibration daily, and a little attention will not affect the actual use.
Anti-glare performance evaluation
the anti-glare performance of Sigma 24-70mm F2.8 DG DN
According to the characteristics of shooting under various harsh light conditions in actual use, Sigma provides this 24 -70mm F2.8 DG DN provides nanoporous coating, which can reduce the influence of strong incident light on imaging under backlight conditions. The actual use experience of this lens is also good: even in the case of the above picture facing 3 light sources at the same time, there is no ghosting and other effects that affect the perception of the screen, and the glare in the lower right corner is also controlled to one. Acceptable, very small range, daily use can rest assured and boldly use this lens for backlight shooting.
Out-of-focus performance evaluation
as one With an F2.8 large-aperture zoom lens, Sigma 24-70mm F2.8 DG DN can provide strong blur throughout the entire process, so its out-of-focus performance becomes very important.
From the real photos, Sigma 24-70mm F2 .8 DG DN’s out-of-focus circle of dispersion is very round, without obvious purple fringing, bright fringe, or bilinearity that affects the look and feel, which can be regarded as a first-class performance in a zoom lens.
More Sigma 24-70mm F2.8 DG DN out-of-focus sample
Close-up performance evaluation
SIGMA 24-70mm F2.8 DG DN 70mm end schematic sample at the closest focusing distance
Sigma 24-70mm F2.8 DG DN 24mm at the closest focusing distance Show sample
In addition, as a feature of this lens, Sigma has strong close-up capabilities not only at the 70mm end, but also at the 24mm end. The specific effect is shown in the figure above. In fact, this kind of “wide-angle and large-aperture” effect is not common, and making good use of it can produce very unique effects.
From a comprehensive point of view, this 24-70mm F2.8 DG DN from Sigma can be said to have brought me a new micro-single large aperture standard zoom lens which is completely different from the past. Experience: The lens is compact in design, the details are well controlled, the sharpness of the center of the full aperture is excellent, the focus and various functions are the same as the original factory, and the close-up ability at the wide-angle end is also impressive. Although the original vignetting of the lens and the axial dispersion in some cases are slightly obvious, it can be easily solved by post-correction. Considering that as long as the price of 7888 is listed, it is undoubtedly highly recommended. It should be said that this time Sigma really unifies high image quality and compactness, and has achieved a surpassing of its past.
For the new Maraisson L mount users, whether it is Sigma fp For users of the Panasonic S1 series, this lens is very suitable for purchase as an on-hook lens due to its compactness, large aperture, and high image quality. For Sony E mount users, this lens is finally available on the market A large aperture standard variable choice with outstanding comprehensive strength, uncompromising in all aspects, and high cost performance.
More Sigma 24-70mm F2.8 DG DN samples
F8 1/60 ISO125
F8 1/160 ISO100
F8 1/250 ISO100
F8 1/250 ISO100
F8 1/125 ISO100
F2.8 1/30 ISO125
F2.8 1/80 ISO800
F2.8 1/30 ISO320
F2.8 1/80 ISO640
F2.8 1 /80 ISO500
F2.8 1/30 ISO200
Author:SINA,If you need to reprint,please indicate the source:http://www.todaycamera.com/camera-news/a-new-era-standard-change-that-dare-to-think-and-act-sigma-24-70mm-f2-8-dg-dn-review