The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Carl Zeiss Distagon T2/28 and the Carl Zeiss Distagon T2,8/25 for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is an important deciding factor when comparing two lenses. Carl Zeiss Distagon T2/28 is the longer of the two lenses at 93mm. The Carl Zeiss Distagon T2,8/25 with a length of 90mm, is 3mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 64mm.
The weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Carl Zeiss Distagon T2,8/25 weighs 480g, 7% (40g) lighter than the Carl Zeiss Distagon T2/28's weight of 520g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Pentax KAF Mount for size comparison purposes.
Wideangle Prime Lenses in Pentax KAF Mount for Size Comparison
Lens Mounts
Both the Carl Zeiss Distagon T2/28 and the Carl Zeiss Distagon T2,8/25 has the same Pentax KAF lens mount. Some of the latest released cameras that are compatible with the Pentax KAF lenses are Pentax KF, Pentax K-3 III and Pentax K-1 II.
Carl Zeiss Distagon T2/28 is also available in Canon EF and Nikon F (FX) mounts.
Carl Zeiss Distagon T2,8/25 is also available in Nikon F (FX) mount.
Focal Range
Carl Zeiss Distagon T2/28 is a prime lens with fixed focal lenght of 28mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 42mm.
Carl Zeiss Distagon T2,8/25 is a prime lens with fixed focal lenght of 25mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 37.5mm.