Zeiss Batis 25mm f/2 Distagon T* Review - Performance

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Zeiss Batis 25mm f/2 Performance

The sharpness of the lens is truly excellent, and even more creditable is the total evenness across the frame, where centre and edge are amazingly close from f/2 right through  to f/11. Even at f/16 the image still borders on excellent, and it's only at f/22 that the sharpness tails off to being very good in the centre and fair to good at the edges. It is still worthwhile to offer f/22 as an option as sometimes maximising depth of field is necessary.


 

 
MTF
MTF
 

How to read our charts

The blue column represents readings from the centre of the picture frame at the various apertures and the green is from the edges. 

The scale on the left side is an indication of actual image resolution as LW/PH. The taller the column, the better the lens performance. Simple.

For this review, the lens was tested on a Sony Alpha A7 using Imatest.

CA is minimal at the centre of the field, less than half a pixel being unlikely to be noticed. The edges do show some clearly visible CA, and this shows in the images with branches against sky. This can be corrected in software.


 

 
CA
CA
 

How to read our charts

Chromatic aberration is the lens' inability to focus on the sensor or film all colours of visible light at the same point. Severe chromatic aberration gives a noticeable fringing or a halo effect around sharp edges within the picture. It can be cured in software.

Apochromatic lenses have special lens elements (aspheric, extra-low dispersion etc) to minimise the problem, hence they usually cost more.

For this review, the lens was tested on a Sony Alpha A7 using Imatest.


As expected for a wide aperture, wide-angle lens, there is some barrel distortion evident, measuring -1.17%. This is actually very reasonable and should not present much of a problem. It is the right way to err, as we are all well versed in expecting wide-angle lenses to show barrelling to some degree.

Smooth bokeh can be seen in the out of focus areas, perhaps not so obviously in a wide lens then it might be with the more selective focus of a telephoto. Very often wide-angles are used at small apertures for increased depth of field, but there are always exceptions. It is worth noting that where the background is out of focus and there are lights included, these are reproduced almost perfectly rounded, which again is impressive, thanks to the almost circular diaphragm opening.

The effectiveness of the T* coating means that flare is virtually banished. Even shooting directly into the sun the images are sharp and well defined, with good saturation and colour. An exemplary performance.

Mechanically, the electronic focusing ring is smooth and even, making manual focusing very easy. The speed of focusing can also be controlled, depending upon whether we rotate the ring slowly or quickly. The AF system is fast and precise, with no hunting or hesitation.


Zeiss Batis 2/25mm Sample Photos


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Comments


10 Nov 2015 10:33AM
I am wondering why you have changed the scale on the left side of the MTV graph. There is no way to compared to other lenses (7 steps vs 10). I am questioning...

JD

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joshwa Plus
9 905 United Kingdom
11 Nov 2015 9:31AM
Hi JD,

We have switched to showing the actual MTF figures in reviews, as this lets you compare with other sites, and is used by a number of other people in the photographic industry. It also lets you know the performance of a lens and camera system, so for example, when testing on a higher resolution camera you should be able to see how much additional resolution you can get compared to a lower resolution camera system.

We have continued to use the same words such as Excellent, Good, etc in the text where we talk about the sharpness of the lens.

Hope this helps,

Josh
11 Nov 2015 1:27PM
Thank Josh for uour prompt response. What is important for me on such a lens is its' hability to produce sharp sides and corners at lower apertures down to f/16. I use my Canon lenses on my A7R II for landscapes and have the Canon 24/70mm f/4 which is the Canon lens best after the TS-E 24 for such task. I was wsiting for the Batis 25 review to see if I would gain in the corners; I alreadyknow it's a blast in the center.

Thx

JD

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