The type of photography that you are planning to use is an important decision factor. Here we have evaluated the 7Artisans 75mm f1.4 and the Sigma 135mm F1.8 DG HSM A 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 A is the longer of the two lenses at 139mm. The 7Artisans 75mm f1.4 with a length of 77mm, is 62mm shorter. Besides being longer, the Sigma 135mm F1.8 DG HSM A also has a larger diameter of 91mm compared to the 7Artisans 75mm f1.4's 62mm 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. 7Artisans 75mm f1.4 weighs 408g, which means it is 722g (63%) lighter than the Sigma 135mm F1.8 DG HSM A which has a weight of 1130g.
Below you can find the dimension and weight table of the Telephoto Prime Lenses in Leica L Mount for size comparison purposes.
Telephoto Lenses in Leica L Mount for Size Comparison
Filter Threads
The 7Artisans 75mm f1.4 has a filter size of 58mm whereas the Sigma 135mm F1.8 DG HSM A 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 58mm filters that we recommend you to consider for the 7Artisans 75mm f1.4:
And these are the 82mm filters that we recommend for the Sigma 135mm F1.8 DG HSM A:
Lens Mounts
Both the 7Artisans 75mm f1.4 and the Sigma 135mm F1.8 DG HSM A has the same Leica L lens mount. Some of the latest released cameras that are compatible with the Leica L lenses are Leica TL2, Leica TL and Leica T Typ 701.
7Artisans 75mm f1.4 is also available in the Sony E , Canon RF and Nikon Z mounts.
Focal Range
7Artisans 75mm f1.4 is a prime lens with fixed focal lenght of 75mm which has an effective (full-frame 35mm equivalent) focal range of
112.5mm when used on a 35mm FF format camera.
On the other hand, the Sigma 135mm F1.8 DG HSM A is a prime lens with fixed focal lenght of 135mm.
