The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Hartblei Macro 120mm F4 TS and the Hartblei 80mm F2.8 IF TS for their suitability to various photography scenarios:
Size and Weight Comparison
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. Hartblei 80mm F2.8 IF TS weighs 850g, 11% (115g) lighter than the Hartblei Macro 120mm F4 TS's weight of 965g.
Below you can find the dimension and weight table of the Perspective Control Prime Lenses in Pentax KAF Mount for size comparison purposes.
PC Lenses in Pentax KAF Mount for Size Comparison
Filter Threads
Both the Hartblei Macro 120mm F4 TS and the Hartblei 80mm F2.8 IF TS have the same Filter thread size of 72mm.
Below are links to the 72mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Hartblei Macro 120mm F4 TS and the Hartblei 80mm F2.8 IF TS 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.
Hartblei Macro 120mm F4 TS is also available in Canon EF , Sony Alpha and Nikon F (FX) mounts.
Hartblei 80mm F2.8 IF TS is also available in Canon EF , Sony Alpha and Nikon F (FX) mounts.
Focal Range
Hartblei Macro 120mm F4 TS is a prime lens with fixed focal lenght of 121mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
181.5mm.
On the other hand, the 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 a 35mm (FF) equivalent of 120mm.