Zeiss's manual-focus 25mm f/2 Distagon for Canon EF — premium wide prime with T* coatings.
The ZEISS Distagon T* 25mm f/2 ZE was released approximately 2011 as a manual-focus full-frame wide prime for Canon EF-mount with electronic contacts for metering and EXIF. Eleven elements in 10 groups including 1 aspherical and 4 AD (anomalous dispersion) elements. Floating element design. Nine circular aperture blades. 67mm non-rotating filter thread. At 570g. 0.25m MFD. Manual focus only.
Eleven elements in 10 groups (1 aspherical + 4 AD/anomalous dispersion elements; floating element design). Nine circular aperture blades. The 67mm non-rotating filter thread. At 570g (some sources incorrectly list 630g — confirmed 570g). Minimum focus distance of 0.25m (1:5.9 magnification). Manual focus only — electronic contacts provide metering and EXIF to Canon EOS bodies; no AF motor. f/2 maximum aperture. Full-frame coverage. Canon EF mount (ZE designation).
The floating element design compensates for field curvature and aberrations that vary with focus distance, maintaining optical correction quality from 0.25m to infinity. The four AD elements reduce lateral chromatic aberration across the 25mm field. The ZE electronic contacts enable aperture control from Canon EOS bodies, unlike earlier Contax/Yashica-mount Zeiss lenses that required mechanical aperture ring operation.
On the used market the ZEISS Distagon T* 25mm f/2 ZE is available at Zeiss manual prime pricing. Condition checks: manual focus helicoid smoothness (should be damped, not gritty), 67mm front element for marks, electronic contact function. Weight is 570g (not 630g). Manual focus only. Compatible with Canon EOS EF bodies; on RF via EF-RF adapter.