The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Hartblei 80mm F2.8 IF TS and the Carl Zeiss Planar T1,4/85 for their suitability to various photography scenarios:
Size and Weight Comparison
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 Planar T1,4/85 weighs 700g, 17% (150g) lighter than the Hartblei 80mm F2.8 IF TS's weight of 850g.
Lens Mounts
Both the Hartblei 80mm F2.8 IF TS and the Carl Zeiss Planar T1,4/85 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.
Hartblei 80mm F2.8 IF TS is also available in Canon EF , Sony Alpha and Nikon F (FX) mounts.
Carl Zeiss Planar T1,4/85 is also available in Canon EF and Nikon F (FX) mounts.
Focal Range
Hartblei 80mm F2.8 IF TS is a prime lens with fixed focal lenght of 80mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 120mm.
Carl Zeiss Planar T1,4/85 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 an 35mm (FF) equivalent of 127.5mm.