For photography enthusiasts, when shooting brilliant starry sky or magnificent mountains and rivers, they always hope that the lens can be “wider and wider” to accommodate more scenery and make the works more powerful. Therefore, the wide-angle lens, can be said to be the scenery, the starry sky photographer essential equipment.
on July 7, Sony officially released Sony Fe 12-24mm f2.8 GM, a full frame super wide angle zoom lens of master G series, with a viewing angle of 122 ° to 84 °. When the whole picture meets such a wide perspective, it is very suitable for shooting scenery, starry sky, architecture and other subjects. After the release of this lens, Sony g master lens constant f2.8 series has also completed the coverage from 12mm to 200mm focal length.
even for a large aperture ultra wide angle lens, compared with the lens of the same level, the volume and weight of Sony Fe 12-24mm f2.8 GM are maintained at a lightweight level. It has a volume of 97.6mm x 137mm and a weight of 847g. It will not bring too much burden to the photographer’s travel.
at present, the price of this lens on the official website is 21999 yuan. In absolute sense, the price is not cheap. However, if the production cost of wide-angle lens and the excellent shooting performance of this lens are taken into account, the price is much more reasonable. In fact, the cost of making a wide-angle lens is relatively high. When it is less than 28mm, it is more difficult to control the spherical aberration, coma and astigmatism of the lens. Especially for the wide-angle lens with large aperture, it needs to use large-size aspheric lens for correction. Therefore, the production cost of this Sony Fe 12-24mm f2.8 GM is high.
Sony Fe 12-24mm f2.8gm is a large lens with constant large aperture. The maximum aperture can reach f2.8 no matter at the 12mm end or 24mm end. And in the actual experience, under the maximum aperture, the picture resolution at both ends of 12mm and 24mm is excellent, especially at the 24mm end. And the optical performance of this lens is also commendable, especially the anti glare and ghost performance.
in short, the price of this lens is also matched with its shooting performance, which can be said to inherit the high-quality level of Sony g Master Series lenses. In terms of focusing performance, Sony Fe 12-24mm f2.8 GM uses XD linear motor and new focusing control algorithm to ensure fast and accurate focusing. After comprehensive consideration, the author gives the lens a score of 8.9. The following is the detailed rating table of this lens:
the fuselage of this evaluation is Sony Alpha 7R IV. The evaluation mainly involves appearance, resolution, dispersion performance, dark angle performance and distortion performance.
Sony Fe 12-24mm f2.8 GM adopts 14 groups of 17 lens structure, including three Xa (super aspheric) lenses, three ed (low dispersion) lenses and two super ed lenses. These lenses determine the excellent image quality of the center and edge area, and effectively control the glare, dispersion and distortion of the picture.
the coating used by Sony Fe 12-24mm f2.8 GM is also worth mentioning. This lens uses the second generation nano AR coating, which can further reduce the glare and ghost image of the picture. Under complex light conditions, it can still retain the contrast of the picture, and the coating appears yellow green in appearance. Moreover, the front lens has a fluoride coating, which can reduce the water stain, oil stain and dust on the lens surface.
this lens has a rear filter slot. It can accommodate insert ND filter, polarizer and other filters to expand the possibility of landscape photographers, and facilitate photographers to use the filter to deal with complex light environment.
in terms of key design, this lens maintains the consistent design of Sony g master series, and is equipped with automatic / manual focusing mode switch, which makes the focus mode switching more convenient and improves the control efficiency. On the upper side of the AF / MF switch is a customizable focus hold button.
the front end of the lens is the focusing ring, and the back end is the zoom ring. The rotation is smooth and smooth. The position of the zoom ring is backward than that of the focusing ring, and the width is wider. The screw design is adopted on the focusing ring and zoom ring, which increases the friction force and realizes more accurate control.
first of all, let’s measure the performance of the image quality, and evaluate the JPG output of the photos. In order to test the difference in image quality as the aperture changes, we lock the sensitivity to ISO 100 and use manual mode to keep the exposure consistent. At the 12mm and 24mm ends, the aperture shrinks from f2.8 to F22. Finally, the center and edge of the image are captured, with 480 * 360 pixels. Let’s take a look at the quality performance of the lens at the 12mm end.
at the 12mm end, the image quality is maintained at a stable level, and there is no obvious decline in image quality in the whole process, whether it is the center or the edge. In terms of the central area, the sharpness of the picture under the large aperture of f2.8 is already very good, so when shooting the starry sky, use the maximum aperture, and there is no need to worry about affecting the image quality. When the aperture is reduced to F16, the image quality will slightly decline, but it will not affect the daily shooting. In terms of edge quality, when the aperture is at F22, the picture details are slightly lost. Let’s take a look at the 24mm end resolution test:
the lens has excellent resolution to the details of the picture at the 24mm end. From the maximum aperture f2.8 to the minimum aperture F22, the high sharpness imaging effect is achieved in the whole process, and the details of the edge and center image are almost no loss.
at the 24mm end, the image quality of this lens is very ideal, whether it is the center or the edge. Even for professional landscape photographers who have high requirements on the resolution of the picture, the image quality of this lens can meet the requirements.
in short, as a constant aperture wide-angle zoom lens, Sony Fe 12-24mm f2.8 GM has excellent image quality. In the 24mm end, the image quality is ideal in both the central region and the edge area. At the 12mm end, the detail resolution is still stable, and only under the aperture F22, some details are lost.
since it is a suitable lens for scenery photography, it is necessary to shoot some sunrise and sunset scenes, architecture and other scenes, so its optical quality performance is still very important. Next, let’s take a look at the dispersion, dark angle and distortion performance of both ends of this lens, starting with dispersion.
at the 12mm end, the dispersion control of the lens is very good. At the maximum aperture, a very slight purple edge can be seen. When it shrinks to F4, the purple edge has disappeared. At the 24mm end, there is a slight purple edge under the large aperture. When the aperture shrinks to f5.6 and F8, the purple edge almost disappears, which is also a common aperture in landscape photography.
it can also be seen from the test that Sony Fe 12-24mm f2.8 GM has excellent anti glare performance, and there is no obvious halo and ghost shadow when shooting directly at the light source. Excellent anti glare performance, but also scenery, star photographers are very important to ensure that the screen is pure when shooting in backlight.
this lens has a slightly dark angle under a large aperture, and the performance of the 24mm end is better than that of the 12mm end. However, the problem of dark angle can be solved later.
after turning on the in machine correction, the dark angle of 12mm and 24mm ends under the large aperture has been significantly improved, which will not cause too much impact on the picture in actual shooting.
in terms of distortion, the distortion control of the lens at 24mm end is excellent, basically no deformation can be seen, and there is slight barrel distortion at 12mm end. For an ultra wide angle lens, such distortion degree is completely acceptable.
on the whole, this lens is an excellent ultra wide angle lens, which is very suitable for scenery, starry sky and architectural photography. In appearance design, the rear filter slot makes it convenient for the photographer to expand the equipment according to the complex light environment at any time. In terms of image quality, the image quality of the 24mm end is very good when the aperture is fully opened, regardless of the center or the edge. The image quality of the 12mm end is still stable. Only when F22 is used, the detail resolution of the edge image is slightly reduced.
in terms of optical quality, the dispersion and anti glare performance are excellent, and you can safely directly shoot stars, sunrise, sunset and other light sources. The distortion control of 24mm end is also excellent, and 12mm has slight barrel distortion, which can be processed in the later stage. When the aperture is fully opened, the dark angle of the lens is slightly heavy, which can be processed in the actual shooting.
it is a recommended choice for photography lovers who have sufficient budget, high requirements for image quality, and like shooting scenery, starry sky and architecture.