The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 56mm F1.4 C and the Fujifilm 18-55mm F2.8-4 R LM 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. Fujifilm 18-55mm F2.8-4 R LM OIS is the longer of the two lenses at 70mm. The Sigma 56mm F1.4 C with a length of 60mm, is 10mm shorter. On the other hand, the Sigma 56mm F1.4 C has a larger diameter of 67mm compared to the Fujifilm 18-55mm F2.8-4 R LM OIS's 65mm 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 C weighs 280g, which means it is 30g (9%) lighter than the Fujifilm 18-55mm F2.8-4 R LM OIS which has a weight of 310g.
Filter Threads
The Sigma 56mm F1.4 C has a filter size of 55mm whereas the Fujifilm 18-55mm F2.8-4 R LM OIS has a 58mm 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 C:
And these are the 58mm filters that we recommend for the Fujifilm 18-55mm F2.8-4 R LM OIS:
Lens Mounts
Both the Sigma 56mm F1.4 C and the Fujifilm 18-55mm F2.8-4 R LM OIS has the same Fujifilm X lens mount. Some of the latest released cameras that are compatible with the Fujifilm X lenses are Fujifilm X-T30 III, Fujifilm X-E5 and Fujifilm X-M5.
Sigma 56mm F1.4 C is also available in the Nikon Z and Canon RF mounts.
Focal Range
Sigma 56mm F1.4 C is a prime lens with fixed focal lenght of 56mm which has an effective (full-frame 35mm equivalent) focal range of
84mm when used on a APS-C / DX format camera.
On the other hand, the Fujifilm 18-55mm F2.8-4 R LM OIS has a focal range of 18-55mm and 3.1X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27-82.5mm when used on a APS-C / DX format camera.
