Sony

Review Sony FE 24-70 mm f/4 ZA OSS Zeiss Vario-Tessar T

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The Sony FE 24-70 mm f/4 is a versatile zoom lens for daily use on a Sony E full-frame camera, like the Sony A7 series, although the lens naturally also fits on Sony cameras with an APS-C sensor and an E mount (Sony A6300). A very compact zoom lens with a very popular zoom range. Do not expect the highest possible sharpness at full aperture, in particular at 24 and 70 mm. Instead of that, enjoy a beautifully built and—partly thanks to the limited brightness—a very handy lens for cameras with a full-frame sensor. The combination of the Sony A7R MK2 test camera with the Sony 24-70 mm f/4 was not much bigger than a micro-43 camera. That is great performance by Sony.

Sony FE 24-70 mm f/4 ZA OSS Zeiss Vario-Tessar T: compact all-arounder

700SonyFE2470

Build and auto focus

The build quality of this lens is flawless, with a beautiful matte black, metal housing. Both the zoom ring and the focus ring turn smoothly and are simultaneously sufficiently dampened not to turn on their own. This lens is extra well-sealed against dust and splashwater. Focusing takes place with a fly-by wire mechanism. There are no focal depth or distance scales on the lens. Turning image stabilization on or off, or setting the camera to manual focus you do on the camera, not with a switch on the lens. This is a lens that is designed for use on cameras with a full-frame sensor, and at the same time, it is light. AF is fast (in 125 ms from infinity to 1.5 meters), silent and accurate. Because the camera focuses on the sensor signaal, you do not have trouble with front or back focus. The shortest focal distance is 40 cm. This lens has a filter size of 67 mm and is delivered including flower-shaped lens hood.
Specifications
Sony FE 24-70mm f/4 OSS
Image Stabilization:+
lenses/ groups:12/10
length x diameter: /
filter size:0
Weight:0
Lens hood:0
2470lensdesign
This lens consists of 12 lens elements in 10 groups. Five aspherical elements and one glass ED element suppress aberrations. ZEISS® T* coating suppresses internal reflections.

Vignetting and chromatic aberration

In the jpg files—and RAW files that you open in Lightroom or Photoshop—vignetting is automatically corrected. That means that you have less than 1 stop of vignetting across the entire range. Only at 24 mm is the vignetting not completely corrected, and it is a bit more than 1 stop. Of itself, 1 stop of vignetting is not that high for a zoom lens on a camera with a full-frame sensor. Even so, the corrected vignetting only drops under half a stop starting at f/8. That correction can be a bit more, as far as I’m concerned.
Chromatic aberration will be automatically corrected. If you work with RAW files in Lightroom/Photoshop or if you use the jpg files out of the camera, then you will not be bothered by it.

jpgvignet

Distortion

Sony FE 24-70 review sample image

Distortion is also automatically corrected, and from 28 mm, you will not have any trouble at all from visible distortion. Sony has consciously chosen a lens design in which significant distortion is present. Move your mouse over the illustration below for the distortion in uncorrected RAW files. 

jpgdistort

Image stabilization

 

The image stabilization of the Sony A7R MK2 worked well. That is very unusual for a camera with a full-frame sensor, since the physical shifts that the sensor has to make in order to combat vibrations become larger as the sensor becomes larger. We tested the image stabilization (Optical Steady Shot: OSS) at the longest focal length because that is the most difficult for sensor image stabilization to correct. We took multiple test shots with and without image stabilization and then measured the sharpness with Imatest. A shot with image stabilization and a shutter time of 1/3 of a second (at 70 mm!) is just as sharp as a shot taken with a shutter time of 1/50 sec without image stabilization. That is a clear profit of 3 stops. The difference from shots made without image stabilization and 1/100 of a second as the shutter time was small. Great performance by Sony.

OSStestSony2470

Sharpness

 

Sony FE 24-70mm review

Below you see the MTF diagrams that Sony has published for this lens. You see the contrast on the vertical axis, set against the distance from the center. The higher the lines, the better. The red line shows the global contrast, while the blue line shows the micro-contrast. It can be clearly seen that the micro-contrast in the corners at the shortest focal length is not the strong point of this lens, and that stopping down does not offer much improvement. Even at 70 mm, the sharpness in the corners is not optimal, but here it does help to stop down. We saw this in our resolution measurements with Imatest as well. Modern cameras have very high resolution and place very high demands on lenses. If you want to make optimal use of them, then choose the Sony FE 55 mm f/1.8. If you want a nicely compact set with high image quality, then try to avoid the extremes of the zoom range and set the camera to f/5.6. You are sure to come home with great shots then. 
Siny2470MTF
Rezz24mmsampleimage

Rezz
Resolution (MTF50) of jpg shots made with Sony A7r II and the Sony FE 24-70 mm f/4 ZA OSS.

Bokeh

Despite an aperture with 7 rounded lamellae, the bokeh is less beautiful and is noisy. Fans of bokeh are better off saving up for a Sony 24-70 mm f/2.8G, which we hope to be able to test shortly. With the announcement of the 24-70 mm f/2.8, Sony is getting deeply into the advanced production process of aspherical lens elements that should ensure that the bokeh of that lens is much nicer. Sony2470Bokeh
Reviews


Conclusion Sony FE 24-70 mm f/4 ZA OSS review with Sony A7 R II

290SonyFE2470

Use our list of reviewed lenses to compare this lens with other lenses.

ECWYSIWYG score: This table shows the performance of this lens if you save the files in the camera as jpg, where you have applied all available in-camera lens corrections. This score gives you for this lens/test camera combination: "What you see is what you get".


24
24
8.4
8.2
7.9
6.8
9.0
9
28
28
8.1
8.0
8.4
7.7
6.9
9
35
35
8.8
8.5
8.4
7.8
8.1
9
50
50
8.9
8.5
8.2
7.9
9.1
9
70
70
8.7
8.3
8.6
7.7
9.2
9
Overall
Overall
8.4
8.2
7.9
7.6
8.3
9
ECPure RAW score: This table shows the performance of this lens if the file is stored in the camera in RAW format. This score approaches the intrinsic quality of the combination of lens and test camera. If you make use of Photoshop or Lightroom for the conversion of RAW files, then the RAW scores are equal to the jpg scores.
24
24
8.1
8.5
9.1
8.0
5.5
9
28
28
9.0
8.8
9.1
8.7
9.0
9
35
35
8.5
8.9
9.1
8.7
5.5
9
50
50
8.4
8.8
9.1
8.9
5.5
9
70
70
8.3
8.8
9.1
8.8
5.5
9
Overall
Overall
8.3
8.8
9.1
8.6
5.5
9

Pros

  • Fast and accurate AF
  • High image quality in the middle of the zoom range
  • Most compact and lightest full-frame zoom
  • No distortion
  • Effective image stabilization

Cons

  • Less sharp at 24 mm and 70 mm
  • Less bright

Sony’s priority was initially placed on the optimal exploitation of the compact dimensions and the low weight of a mirrorless system camera. Sony deliberately chose f/4: The Sony 24-70 mm f/4 is a full-frame lens that can also be used well on a Sony alpha camera with E mount and an APS-C sensor. Soon a (more expensive, bigger and heavier) f/2.8 FE zoom from Sony will appear that stands out on the points where the Sony 24-70 mm f/4 lags a bit as far as image quality is concerned. The center sharpness of the 24-70 mm f/4 is very high at all focal lengths starting from full aperture. At all focal lengths, you gain sharpness by stopping down to f/5.6. The corner sharpness at the extremes of the zoom range (24 mm, 70 mm) lags a bit behind the center. The build quality of this light, compact zoom is fantastic. The very effective image stabilization is also a pleasure. In addition, the lens is extra well sealed against dust and splashwater. This is not an inexpensive lens, but you can get a great deal of enjoyment out of it.

Ivo Freriks
Author: Ivo Freriks
With Camera Review Stuff I hope to make a modest contribution to the pleasure that you get from photography. By testing cameras and lenses in the same way, evluating the results and weighing up the pros and cons, I hope to help you find the right camera or lens.

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