Zeiss Otus 100mm f/1.4 APO-Sonnar: Portrait Example (Nikon D850)
Get Zeiss Otus at B&H Photo.
The gorgeous velvety-smooth bokeh of the Zeiss Otus 100mm f/1.4 APO-Sonnar is awesome for portraits and the high grade color correction leads to nearly neutral out of focus backgrounds.
The trick is focusing, because even if focusing is perfect, movement of a few millimeters of the subject or photographer can throw focus off the eyes. See Focusing Zeiss DSLR Lenses For Peak Performance, PART ONE: The Challenges and Focusing Zeiss DSLR Lenses For Peak Performance PART TWO: Tips and Best Practices for Sharply Focused Images.
In diglloyd Zeiss DSLR Lenses:
Zeiss Otus 100mm f/1.4 APO-Sonnar: Portrait Example
Includes images up to full camera resolution.