The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 135mm F1.4 and the 7Artisans 75mm f1.4 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 F1.4 is the longer of the two lenses at 136mm. The 7Artisans 75mm f1.4 with a length of 77mm, is 59mm shorter. Besides being longer, the Sigma 135mm F1.4 also has a larger diameter of 112mm 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, 71% (1022g) lighter than the Sigma 135mm F1.4's weight of 1430g.
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 Sigma 135mm F1.4 has a filter size of 105mm whereas the 7Artisans 75mm f1.4 has a 58mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 105mm filters that we recommend you to consider for the Sigma 135mm F1.4:
And these are the 58mm filters that we recommend for the 7Artisans 75mm f1.4:
Lens Mounts
Both the Sigma 135mm F1.4 and the 7Artisans 75mm f1.4 has the same Leica L lens mount. Some of the latest released cameras that are compatible with the Leica L lenses are Leica SL3-P, Panasonic S1 II and Panasonic S1 IIE.
Sigma 135mm F1.4 is also available in the Sony E mount.
7Artisans 75mm f1.4 is also available in Sony E , Canon RF and Nikon Z mounts.
Focal Range
Sigma 135mm F1.4 is a prime lens with fixed focal lenght of 135mm.
On the other hand, the 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.
