The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Carl Zeiss Distagon T2,8/25 and the Venus 25mm F2.8 2.5-5X Ultra Macro for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is a crucial factor to consider when comparing two lenses. Carl Zeiss Distagon T2,8/25 is the longer of the two lenses at 90mm. The Venus 25mm F2.8 2.5-5X Ultra Macro with a length of 65mm, is 25mm shorter. On the other hand, the Venus 25mm F2.8 2.5-5X Ultra Macro has a larger diameter of 82mm compared to the Carl Zeiss Distagon T2,8/25's 64mm diameter.
The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Venus 25mm F2.8 2.5-5X Ultra Macro weighs 400g, 16% (80g) lighter than the Carl Zeiss Distagon T2,8/25's weight of 480g.
Lens Mounts
The Carl Zeiss Distagon T2,8/25 has the Pentax KAF lens mount whereas the Venus 25mm F2.8 2.5-5X Ultra Macro has the Pentax KAF2 lens mount. Some of the latest released cameras that are compatible with these mounts are Pentax K-3 III Monochrome, Pentax KF and Pentax K-3 III for the Pentax KAF Mount and Pentax K-3 III Monochrome, Pentax KF and Pentax K-3 III for the Pentax KAF2 Mount.
Carl Zeiss Distagon T2,8/25 is also available in Nikon F (FX) mount.
Venus 25mm F2.8 2.5-5X Ultra Macro is also available in Canon EF , Nikon F (DX) and Sony E mounts.
Focal Range
Both lenses have the same focal range of
25mm and the fastest aperture of
F2.8.