The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Venus 105mm F2 and the Carl Zeiss Makro-Planar T2/100 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 Makro-Planar T2/100 is the longer of the two lenses at 113mm. The Venus 105mm F2 with a length of 99mm, is 14mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 76mm.
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. Carl Zeiss Makro-Planar T2/100 weighs 680g, 8% (65g) lighter than the Venus 105mm F2's weight of 745g.
Filter Threads
Both the Venus 105mm F2 and the Carl Zeiss Makro-Planar T2/100 have the same Filter thread size of 67mm.
Below are links to the 67mm filters that we recommend you to consider for these lenses:
Lens Mounts
The Venus 105mm F2 has the Pentax KAF2 lens mount whereas the Carl Zeiss Makro-Planar T2/100 has the Pentax KAF lens mount. Some of the latest released cameras that are compatible with these mounts are Pentax K-3 III Mono, Pentax KF and Pentax K-3 III for the Pentax KAF2 Mount and Pentax K-3 III Mono, Pentax KF and Pentax K-3 III for the Pentax KAF Mount.
Venus 105mm F2 is also available in the Sony E , Canon EF, Nikon F (FX) and Sony Alpha mounts.
Carl Zeiss Makro-Planar T2/100 is also available in Canon EF and Nikon F (FX) mounts.
Focal Range
Venus 105mm F2 is a prime lens with fixed focal lenght of 105mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
157.5mm.
On the other hand, the Carl Zeiss Makro-Planar T2/100 is a prime lens with fixed focal lenght of 100mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 150mm.
