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 Sigma 135mm F1.8 DG HSM 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. Sigma 135mm F1.8 DG HSM is the longer of the two lenses at 115mm. The Hartblei Macro 120mm F4 TS with a length of 106mm, is 9mm shorter. Besides being longer, the Sigma 135mm F1.8 DG HSM also has a larger diameter of 91mm compared to the Hartblei Macro 120mm F4 TS's 89mm 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. Hartblei Macro 120mm F4 TS weighs 965g, which means it is 165g (14%) lighter than the Sigma 135mm F1.8 DG HSM which has a weight of 1130g.
Filter Threads
The Hartblei Macro 120mm F4 TS has a filter size of 72mm whereas the Sigma 135mm F1.8 DG HSM has a 82mm 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 Hartblei Macro 120mm F4 TS:
And these are the 82mm filters that we recommend for the Sigma 135mm F1.8 DG HSM:
Lens Mounts
Both the Hartblei Macro 120mm F4 TS and the Sigma 135mm F1.8 DG HSM has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Canon 1D X III, Canon 6D MII and Canon 5D MIV.
Hartblei Macro 120mm F4 TS is also available in Pentax KAF , Sony Alpha and Nikon F (FX) mounts.
Sigma 135mm F1.8 DG HSM is also available in Sigma SA , Nikon F (FX) and Sony E 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 1.6x crop, it provides a 35mm (FF) equivalent of
193.6mm.
On the other hand, the Sigma 135mm F1.8 DG HSM is a prime lens with fixed focal lenght of 135mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 216mm.