Zeiss Batis APO Sonnar 135mm f/2.8 Lens Review
Zeiss Batis has nice neutral bokeh without significant aberrations. Typical for all Zeiss lenses is rather large mechanical vignetting, resulting in the cat eye shaped deformation of the circular highlights toward image edges. This aberration creates sometimes swirling illusion effect. Apart of that, there is insignificant monochromatic outline of the highlight circles and nothing more. Bokeh is thus neutral, smooth and in most cases very pleasing.
Minimum focus distance could have been slightly shorter (870mm) and max magnification slightly larger (0.19x), but it is fairly comparable with most other lenses in this category except the Sony SAL 135/1.8 which is winner here (720mm, 0.25x)
In practice, I never had a problem with Batis 135 and its max f/2.8 aperture, resulting in a presumable narrower DOF. I found it easy to separate subjects from the background, being it a portrait model or something smaller, like flower e.g. In one or two images, you might notice gentle swirly effect, that I mentioned earlier.
There are more images to judge bokeh in the portrait and sample gallery.
All images bellow where post processed to our liking. They should not be considered as a merit for the lens pure optical performance, but they should help you to recognize, what can be achieved as a final output.