The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 56mm F1.4 DC DN C and the Panasonic Leica 42.5mm F1.2 OIS 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. Panasonic Leica 42.5mm F1.2 OIS is the longer of the two lenses at 77mm. The Sigma 56mm F1.4 DC DN C with a length of 60mm, is 17mm shorter. Besides being longer, the Panasonic Leica 42.5mm F1.2 OIS also has a larger diameter of 74mm compared to the Sigma 56mm F1.4 DC DN C's 67mm 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. Sigma 56mm F1.4 DC DN C weighs 280g, which means it is 145g (34%) lighter than the Panasonic Leica 42.5mm F1.2 OIS which has a weight of 425g.
Filter Threads
The Sigma 56mm F1.4 DC DN C has a filter size of 55mm whereas the Panasonic Leica 42.5mm F1.2 OIS has a 67mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 55mm filters that we recommend you to consider for the Sigma 56mm F1.4 DC DN C:
And these are the 67mm filters that we recommend for the Panasonic Leica 42.5mm F1.2 OIS:
Lens Mounts
Both the Sigma 56mm F1.4 DC DN C and the Panasonic Leica 42.5mm F1.2 OIS has the same Micro Four Thirds lens mount. Some of the latest released cameras that are compatible with the Micro Four Thirds lenses are OM System OM-3 Astro, OM System OM-5 II and OM System OM-3.
Sigma 56mm F1.4 DC DN C is also available in the Sony E and Leica L mounts.
Focal Range
Sigma 56mm F1.4 DC DN C is a prime lens with fixed focal lenght of 56mm which has an effective (full-frame 35mm equivalent) focal range of
112mm when used on a APS-C / DX format camera.
On the other hand, the Panasonic Leica 42.5mm F1.2 OIS is a prime lens with fixed focal lenght of 43mm which has an effective (full-frame 35mm equivalent) focal range of 86mm when used on a FourThirds format camera.
