Carl Zeiss 25mm F2.8 Distagon T* ZE-I Specifications
Diagonal Angle of View:
Number of Aperture Blades:
17cm (with a minimum working distance of 6cm)
66mm (90mm incl. caps)
floating elements, manual focus only
Full Focus Throw:
E-TTL II (Distance Information):
bayonet mounted, flower shaped, included
2013 by Cosina
This lens is also available as ZF, ZF.2, ZF-I (all N/F) and ZS-I (M42). The -I denotes Industrial versions with special dust and moisture sealings as well as screw-fixed aperture and focus. The 2.8/25 is not available as ZE otherwise.
The 2.8/25 is further available as ZF-IR and ZS-IR. The IR versions also come with the position-fixing screws and special coatings allowing for better NIR transmission.
Technical specifications were taken from the ZF.2. Add a few grams and perhaps a few millimeters to the lens' length for ZE. The extra treatments to make it ready for industrial purposes might add some weight as well.