The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Panasonic 18-40mm F4.5-6.3 and the Sigma 20mm F1.4 DG DN 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 20mm F1.4 DG DN A is the longer of the two lenses at 111mm. The Panasonic 18-40mm F4.5-6.3 with a length of 41mm, is 70mm shorter. Besides being longer, the Sigma 20mm F1.4 DG DN A also has a larger diameter of 88mm compared to the Panasonic 18-40mm F4.5-6.3's 68mm diameter.
Below you can find a scaled side-by-side image of Panasonic 18-40mm F4.5-6.3 and Sigma 20mm F1.4 DG DN A to get a better idea of how their sizes compare in real life.
Comparison image of the Panasonic 18-40mm F4.5-6.3 and the Sigma 20mm F1.4 DG DN A Size and Weight 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 18-40mm F4.5-6.3 weighs 155g, which means it is 480g (75%) lighter than the Sigma 20mm F1.4 DG DN A which has a weight of 635g.
Filter Threads
The Panasonic 18-40mm F4.5-6.3 has a filter size of 62mm whereas the Sigma 20mm F1.4 DG DN 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 62mm filters that we recommend you to consider for the Panasonic 18-40mm F4.5-6.3:
And these are the 82mm filters that we recommend for the Sigma 20mm F1.4 DG DN A:
Lens Mounts
Both the Panasonic 18-40mm F4.5-6.3 and the Sigma 20mm F1.4 DG DN 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 .
Sony E mount.
Focal Range
Panasonic 18-40mm F4.5-6.3 has a focal range of 18-40mm and
2.2X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
27 - 60mm .
On the other hand, the Sigma 20mm F1.4 DG DN A is a prime lens with fixed focal lenght of 20mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 36mm .
