The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Panasonic S 40mm F2 and the Sigma 50mm F1.4 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 50mm F1.4 DG HSM A is the longer of the two lenses at 100mm. The Panasonic S 40mm F2 with a length of 41mm, is 59mm shorter. Besides being longer, the Sigma 50mm F1.4 DG HSM A also has a larger diameter of 85mm compared to the Panasonic S 40mm F2's 69mm 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. Panasonic S 40mm F2 weighs 144g, which means it is 671g (82%) lighter than the Sigma 50mm F1.4 DG HSM A which has a weight of 815g.
Below you can find the dimension and weight table of the Standard Prime Lenses in Leica L Mount for size comparison purposes.
Standard Lenses in Leica L Mount for Size Comparison
Filter Threads
The Panasonic S 40mm F2 has a filter size of 62mm whereas the Sigma 50mm F1.4 DG HSM A has a 77mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 62mm filters that we recommend you to consider for the Panasonic S 40mm F2:
And these are the 77mm filters that we recommend for the Sigma 50mm F1.4 DG HSM A:
Lens Mounts
Both the Panasonic S 40mm F2 and the Sigma 50mm F1.4 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 SL3-P, Panasonic S1 II and Panasonic S1 IIE.
Sigma 50mm F1.4 DG HSM A is also available in Canon EF , Sony Alpha, Sigma SA and Nikon F (FX) mounts.
Focal Range
Panasonic S 40mm F2 is a prime lens with fixed focal lenght of 40mm.
On the other hand, the Sigma 50mm F1.4 DG HSM A is a prime lens with fixed focal lenght of 50mm.
