The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang T-S 24mm f3.5 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. Samyang T-S 24mm f3.5 weighs 680g, which means it is 170g (19%) lighter than the Hartblei 80mm F2.8 IF TS which has a weight of 850g.
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
The Samyang T-S 24mm f3.5 has a filter size of 82mm 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 82mm filters that we recommend you to consider for the Samyang T-S 24mm f3.5:
And these are the 72mm filters that we recommend for the Hartblei 80mm F2.8 IF TS:
Lens Mounts
Both the Samyang T-S 24mm f3.5 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.
Samyang T-S 24mm f3.5 is also available in Canon EF , Nikon F (FX), Sony Alpha and Sony E mounts.
Hartblei 80mm F2.8 IF TS is also available in Canon EF , Sony Alpha and Nikon F (FX) mounts.
Focal Range
Samyang T-S 24mm f3.5 is a prime lens with fixed focal lenght of 24mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
36mm.
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.