The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 24mm F1.8 EX DG and the Canon 18-55mm f3.5-5.6 II 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 24mm F1.8 EX DG is the longer of the two lenses at 83mm. The Canon 18-55mm f3.5-5.6 II with a length of 80mm, is 3mm shorter. Besides being longer, the Sigma 24mm F1.8 EX DG also has a larger diameter of 84mm compared to the Canon 18-55mm f3.5-5.6 II's 69mm 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. Canon 18-55mm f3.5-5.6 II weighs 190g, 62% (310g) lighter than the Sigma 24mm F1.8 EX DG's weight of 500g.
Filter Threads
The Sigma 24mm F1.8 EX DG has a filter size of 77mm whereas the Canon 18-55mm f3.5-5.6 II 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 77mm filters that we recommend you to consider for the Sigma 24mm F1.8 EX DG:
And these are the 58mm filters that we recommend for the Canon 18-55mm f3.5-5.6 II:
Lens Mounts
The Sigma 24mm F1.8 EX DG has the Pentax KAF lens mount whereas the Canon 18-55mm f3.5-5.6 II has the Canon EF-S lens mount. Some of the latest released cameras that are compatible with these mounts are Pentax K-3 III Mono, Pentax KF and Pentax K-3 III for the Pentax KAF Mount and Canon T8i, Canon 90D and Canon SL3 for the Canon EF-S Mount.
Sigma 24mm F1.8 EX DG is also available in the Canon EF , Nikon F (FX), Four Thirds, Pentax KAF, Sony Alpha, Sigma SA, Canon EF, Sony Alpha, Sigma SA and Nikon F (FX) mounts.
Focal Range
Sigma 24mm F1.8 EX DG is a prime lens with fixed focal lenght of 28mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
42mm.
On the other hand, the Canon 18-55mm f3.5-5.6 II has a focal range of 18-55mm and 3.1X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 28.8-88mm when used on a APS-C / DX format camera.
