The type of photography that you are planning to use is an important decision factor. Here we have evaluated the 7Artisans FF 18mm f5.6 E and the Sigma 45mm F2.8 DG 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. Sigma 45mm F2.8 DG DN C is the longer of the two lenses at 46mm. The 7Artisans FF 18mm f5.6 E with a length of 32mm, is 14mm shorter. Besides being longer, the Sigma 45mm F2.8 DG DN C also has a larger diameter of 64mm compared to the 7Artisans FF 18mm f5.6 E's 61mm 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 FF 18mm f5.6 E weighs 146g, which means it is 69g (32%) lighter than the Sigma 45mm F2.8 DG DN C which has a weight of 215g.
Filter Threads
The 7Artisans FF 18mm f5.6 E has a filter size of 49mm whereas the Sigma 45mm F2.8 DG 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 49mm filters that we recommend you to consider for the 7Artisans FF 18mm f5.6 E:
And these are the 55mm filters that we recommend for the Sigma 45mm F2.8 DG DN C:
Lens Mounts
The 7Artisans FF 18mm f5.6 E has the Sony E lens mount whereas the Sigma 45mm F2.8 DG DN C has the Leica L lens mount. Some of the latest released cameras that are compatible with these mounts are Sony FX5, Sony A7R VI and Sony A7 V for the Sony E Mount and Leica SL3-P, Panasonic S1 II and Panasonic S1 IIE for the Leica L Mount.
Sigma 45mm F2.8 DG DN C is also available in Sony E mount.
Focal Range
7Artisans FF 18mm f5.6 E is a prime lens with fixed focal lenght of 18mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
27mm.
On the other hand, the Sigma 45mm F2.8 DG DN C is a prime lens with fixed focal lenght of 45mm.
