The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Rokinon 85mm F1.4 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 Rokinon 85mm F1.4 with a length of 75mm, is 38mm shorter. On the other hand, the Rokinon 85mm F1.4 has a larger diameter of 78mm compared to the Carl Zeiss Makro-Planar T2/100's 76mm 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. Rokinon 85mm F1.4 weighs 539g, which means it is 141g (20%) lighter than the Carl Zeiss Makro-Planar T2/100 which has a weight of 680g.
Filter Threads
The Rokinon 85mm F1.4 has a filter size of 72mm whereas the Carl Zeiss Makro-Planar T2/100 has a 67mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 72mm filters that we recommend you to consider for the Rokinon 85mm F1.4:
And these are the 67mm filters that we recommend for the Carl Zeiss Makro-Planar T2/100:
Lens Mounts
Both the Rokinon 85mm F1.4 and the Carl Zeiss Makro-Planar T2/100 has the same Pentax KAF lens mount. Some of the latest released cameras that are compatible with the Pentax KAF lenses are Pentax K-3 III Monochrome, Pentax KF and Pentax K-3 III.
Rokinon 85mm F1.4 is also available in Canon EF , Four Thirds, Sony Alpha, Samsung NX and Nikon F (FX) mounts.
Carl Zeiss Makro-Planar T2/100 is also available in Canon EF and Nikon F (FX) mounts.
Focal Range
Rokinon 85mm F1.4 is a prime lens with fixed focal lenght of 85mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
127.5mm.
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.