The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Panasonic Leica 12-35mm F2.8 and the Sigma 56mm F1.4 DC DN C 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 12-35mm F2.8 is the longer of the two lenses at 74mm. The Sigma 56mm F1.4 DC DN C with a length of 60mm, is 14mm shorter. Besides being longer, the Panasonic Leica 12-35mm F2.8 also has a larger diameter of 68mm 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, 8% (26g) lighter than the Panasonic Leica 12-35mm F2.8's weight of 306g.
Filter Threads
The Panasonic Leica 12-35mm F2.8 has a filter size of 58mm whereas the Sigma 56mm F1.4 DC DN C has a 55mm 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 Panasonic Leica 12-35mm F2.8:
And these are the 55mm filters that we recommend for the Sigma 56mm F1.4 DC DN C:
Lens Mounts
Both the Panasonic Leica 12-35mm F2.8 and the Sigma 56mm F1.4 DC DN C 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 Sony E and Leica L mounts.
Focal Range
Panasonic Leica 12-35mm F2.8 has a focal range of 12-35mm and
2.9X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
24-70mm when used on a FourThirds format camera.
On the other hand, the 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.
