Carl Zeiss Apo Sonnar T* 2,0/135 ZF.2 (Nikon) mount lens review: Unsurpassed Moderate TelephotoBy Kevin Carter - Tuesday December 03 2013 Lens Review
Along with the new Otus 1,4/55, Zeiss produce the two top performing primes in our database when analyzed on the Nikon D800. Although the DxOMark scores are close to the Otus and match the AF-S Nikkor 85mm f1.4, the peak sharpness score is significantly higher than the highly regarded Nikon lens and very close to the $4,000 Otus 1,4/55.
Most of the gains in sharpness over the Nikkor will be made across the frame at wider apertures. Typically, 135mm lenses are much easier to design and produce than other focal lengths, but this is a high-speed model and aberration correction remains challenging.
Best moderate prime
Compared with others of a similar focal length the superior image quality of the Zeiss is quite clear. With a DxOMark score of 36 points, even the highly regarded Zeiss Makro Planar T* 2/100 is far off the peak sharpness of the Apo Sonnar T*.