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F1.8 series fixed focus lens is the representative of high quality and low price in Nikon SLR F mount lens, so it is also short in Nikon mirrorless Z mount. A number of F1.8 prime lenses were quickly launched in just two years. Not long ago, we just finished evaluating the fourth Z-mount F1.8 prime lens NIKKOR Z 24mm f/1.8 S. What this article will introduce is The fifth Z-mount F1.8 fixed focal lens NIKKOR Z 20mm f/1.8 S.
Nikkor Z 20mm f/1.8 S
NIKKOR Z 20mm f/1.8 S is an S-type high-performance wide-angle lens compatible with Nikon FX format. The images taken with this lens have good resolution and rendering performance. Although it is a wide-angle lens, it still has a smooth and beautiful background bokeh effect, making it a good choice for taking pictures where the subject and the background stand out. It can also achieve good point image restoration performance, especially when shooting starry sky and other night scenes, and effectively control the sagittal coma aberration to faithfully restore the point light source.
Nikkor Z 20mm f/1.8 S
NIKKOR Z 20mm f/1.8 S takes advantage of the large diameter and short flange distance of the Nikon Z mount. It covers the entire shooting distance range, including the maximum aperture. Under this aperture value, high-resolution images can be obtained stably. Using the “multi-focus system”, close-range autofocus accuracy can be improved, and high-resolution images can be taken.
Nikkor Z 20mm f/1.8 S lens structure diagram
Nikkor Z 20mm f/1.8 S lens MTF curve
NIKKOR Z 20mm f/1.8 S lens body
In terms of design, NIKKOR Z 20mm f/ The 1.8 S continues the design style of the previous F1.8 lenses. The filter diameter is 77mm, the size is about 84.5 x 108.5mm, and the weight is about 505g.
Nikkor Z 20mm f/1.8 S coating
In terms of the structure of the lens, the NIKKOR Z 20mm f/1.8 S adopts a design of 14 elements in 11 groups, including 3 low-dispersion ED lenses, 3 aspherical lenses and The lens with nano crystal coating can effectively compensate the axial chromatic aberration for the entire shooting range from close distance to infinity, helping to provide clear resolution. Nano crystal coating can effectively reduce the effects of ghost and flare caused by the sun in wide-angle landscape photos, and present clear images. At the same time, the lens adopts an electromagnetic iris device, which can realize accurate iris control.
Nikkor Z 20mm f/1.8 S mount
NIKKOR Z 20mm f/1.8 S adopts a metal mount, which is durable and durable. And the lens body also adopts a dust-proof and drip-proof design, which is capable of shooting in daily harsh environments.
Nikkor Z 20mm f/1.8 S lens body button
NIKKOR Z 20mm f/1.8 S lens body has only one switch to control AF/MF switching. However, the control ring of the NIKKOR Z 20mm f/1.8 S can be set through the camera’s menu, and the set control ring can realize the function of adjusting focus, aperture, or exposure compensation. When the manual focus mode is selected, it can also be used as a focus ring.
Nikkor Z 20mm f/1.8 S lens hood
NIKKOR Z 20mm f/1.8 S is equipped with a flower-shaped lens hood model HB-95, which can prevent stray light from entering the lens, and also protect the camera and The lens prevents accidental collision.
Next, we will test the resolution of the NIKKOR Z 20mm f/1.8 S in the actual scene. The entire scene has a rich level of detail, and the frontal composition is also used to ensure that the edge of the picture can also be in focus, so that the resolution of the edge can be better reflected and be relatively objective.
Schematic diagram of interception area
resolution test Comparison table
Through the comparison, we can see that the center resolution of NIKKOR Z 20mm f/1.8 S performs very well at various apertures. The performance when the aperture is fully opened is also very good, and the picture details are full. Full, when the aperture receives F4, the picture quality is the best. The resolution of the edges is equally good, but there is a slight drop relative to the center, and the best aperture is also at F4.
NIKKOR Z 20mm f/1.8 S has an aperture composed of 9 blades, and the F1.8 large aperture can create a soft background blur effect. At the same time, the lens is an electromagnetic iris, the device can also effectively control the iris during continuous shooting, helping to achieve stable iris control. Let’s take a look at it through test samples.
aperture blur Test table
From the test chart, you can clearly see the difference in the background blur effect under different apertures. Although the NIKKOR Z 20mm f/1.8 S is a wide-angle lens, the blur of the background is still very soft and beautiful when the F1.8 aperture is fully opened.
vignetting test table
Through the real shooting test, we can see that the NIKKOR Z 20mm f/1.8 S has a more obvious vignetting when the aperture is fully opened. As the aperture narrows, the dark corners gradually disappear. Since F2.8, there has been no obvious vignetting.
distortion test sample
In terms of distortion, it can be seen through the NIKKOR Z 20 mm f/1.8 S distortion test sample that although the NIKKOR Z 20 mm f/1.8 S is one Wide-angle lens, but there is no clear distortion in the pictures taken, which is enough to prove its excellent optical performance.
Focal length: 20mm ISO: 100 Aperture: F1.8 Shutter: 1/3200s
Focal length: 20mm ISO: 100 Aperture: F8 Shutter: 1/320s
Focal length: 20mm ISO: 100 Aperture: F5.6 Shutter: 1/1250s
Focal length: 20mm ISO: 100 aperture : F5.6 Shutter: 1/800s
Focal length: 20mm ISO: 100 Aperture: F1.8 Shutter: 1/8000s
Focal length: 20mm ISO: 100 Aperture: F1.8 Shutter: 1/6400s
Focal length: 20mm ISO: 100 Aperture: F2.8 Shutter: 1/8000s
As a new member of Nikon’s full-frame mirrorless Z series F1.8 series fixed focus lens, the NIKKOR Z 20 mm f/1.8 S is the same as the previous four models, with a unified lens body design concept, size and weight. Appropriate benefits, very good performance in focusing speed, image sharpness and background blur. As a 20mm wide-angle lens, the distortion control performance of the NIKKOR Z 20 mm f/1.8 S is also impressive. Based on the characteristics of the focal length and the configuration of the F1.8 series lens, the NIKKOR Z 20 mm f/1.8 S is very suitable for users who love landscape photography, especially starry sky photography.
Nikkor Z 20 mm f/1.8 S
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