The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon EF-M 15-45mm F3.5-6.3 and the Sigma 17-50mm F2.8 EX DC OS 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. Sigma 17-50mm F2.8 EX DC OS HSM is the longer of the two lenses at 92mm. The Canon EF-M 15-45mm F3.5-6.3 with a length of 45mm, is 47mm shorter. Besides being longer, the Sigma 17-50mm F2.8 EX DC OS HSM also has a larger diameter of 84mm compared to the Canon EF-M 15-45mm F3.5-6.3'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. Canon EF-M 15-45mm F3.5-6.3 weighs 130g, which means it is 435g (76%) lighter than the Sigma 17-50mm F2.8 EX DC OS HSM which has a weight of 565g.
Filter Threads
The Canon EF-M 15-45mm F3.5-6.3 has a filter size of 49mm whereas the Sigma 17-50mm F2.8 EX DC OS HSM has a 77mm 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 Canon EF-M 15-45mm F3.5-6.3:
And these are the 77mm filters that we recommend for the Sigma 17-50mm F2.8 EX DC OS HSM:
Lens Mounts
The Canon EF-M 15-45mm F3.5-6.3 has the Canon EF-M lens mount whereas the Sigma 17-50mm F2.8 EX DC OS HSM has the Canon EF lens mount. Some of the latest released cameras that are compatible with these mounts are , and for the Canon EF-M Mount and Canon T8i, Canon 90D and Canon SL3 for the Canon EF Mount.
Sigma 17-50mm F2.8 EX DC OS HSM is also available in Pentax KAF3 , Sony Alpha, Sigma SA and Nikon F (DX) mounts.
Focal Range
Canon EF-M 15-45mm F3.5-6.3 has a focal range of 15-45mm and
3.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
22.5-67.5mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 17-50mm F2.8 EX DC OS HSM has a focal range of 17-50mm and 2.9X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27.2-80mm when used on a APS-C / DX format camera.
