The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Pentax D-FA 100mm F2.8 Macro WR 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. Pentax D-FA 100mm F2.8 Macro WR weighs 340g, which means it is 510g (60%) lighter than the Hartblei 80mm F2.8 IF TS which has a weight of 850g.
Filter Threads
The Pentax D-FA 100mm F2.8 Macro WR has a filter size of 49mm whereas the Hartblei 80mm F2.8 IF TS has a 72mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 49mm filters that we recommend you to consider for the Pentax D-FA 100mm F2.8 Macro WR:
And these are the 72mm filters that we recommend for the Hartblei 80mm F2.8 IF TS:
Lens Mounts
Both the Pentax D-FA 100mm F2.8 Macro WR 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 80mm F2.8 IF TS is also available in Canon EF , Sony Alpha and Nikon F (FX) mounts.
Focal Range
Pentax D-FA 100mm F2.8 Macro WR 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.
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.