A superb lens with amazing image quality. on a fully open aperture, the lens is quite working, the background is perfectly blurred, the bokeh is very beautiful. By the way, to "experts" in optical engineering: For Zeiss lenses, the index T * means the uniformity of the color reproduction of the image given by the lens. In the film era and the use of reversible (slide) photographic films, when viewing pictures through a slide projector, there was a noticeable difference in color reproduction between pictures taken with different lenses. It was Zeiss who developed a line of lenses with uniform color reproduction and designated this line with the T * index. It has nothing to do with f-numbers.
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