The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon EF-S 18-55mm F4-5.6 IS STM and the Sigma 30mm F1.4 EX DC HSM 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. Canon EF-S 18-55mm F4-5.6 IS STM is the longer of the two lenses at 62mm. The Sigma 30mm F1.4 EX DC HSM with a length of 59mm, is 3mm shorter. On the other hand, the Sigma 30mm F1.4 EX DC HSM has a larger diameter of 77mm compared to the Canon EF-S 18-55mm F4-5.6 IS STM'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. Canon EF-S 18-55mm F4-5.6 IS STM weighs 215g, which means it is 215g (50%) lighter than the Sigma 30mm F1.4 EX DC HSM which has a weight of 430g.
Filter Threads
The Canon EF-S 18-55mm F4-5.6 IS STM has a filter size of 58mm whereas the Sigma 30mm F1.4 EX DC HSM has a 62mm 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 Canon EF-S 18-55mm F4-5.6 IS STM:
And these are the 62mm filters that we recommend for the Sigma 30mm F1.4 EX DC HSM:
Lens Mounts
Both the Canon EF-S 18-55mm F4-5.6 IS STM and the Sigma 30mm F1.4 EX DC HSM has the same Canon EF-S lens mount. Some of the latest released cameras that are compatible with the Canon EF-S lenses are Canon T8i, Canon 90D and Canon SL3.
Sigma 30mm F1.4 EX DC HSM is also available in Nikon F (DX) , Four Thirds, Pentax KAF, Sony Alpha and Sigma SA mounts.
Focal Range
Canon EF-S 18-55mm F4-5.6 IS STM 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.
On the other hand, the Sigma 30mm F1.4 EX DC HSM is a prime lens with fixed focal lenght of 30mm which has an effective (full-frame 35mm equivalent) focal range of 48mm when used on a APS-C / DX format camera.
