The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 21mm F1.4 ED AS UMC CS and the Canon EF-M 15-45mm F3.5-6.3 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. Samyang 21mm F1.4 ED AS UMC CS is the longer of the two lenses at 68mm. The Canon EF-M 15-45mm F3.5-6.3 with a length of 45mm, is 23mm shorter. Besides being longer, the Samyang 21mm F1.4 ED AS UMC CS also has a larger diameter of 64mm compared to the Canon EF-M 15-45mm F3.5-6.3's 61mm diameter.
Below you can find a scaled side-by-side image of Samyang 21mm F1.4 ED AS UMC CS and Canon EF-M 15-45mm F3.5-6.3 to get a better idea of how their sizes compare in real life.
Comparison image of the Samyang 21mm F1.4 ED AS UMC CS and the Canon EF-M 15-45mm F3.5-6.3 Size and Weight 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, 52% (145g) lighter than the Samyang 21mm F1.4 ED AS UMC CS's weight of 275g.
Filter Threads
The Samyang 21mm F1.4 ED AS UMC CS has a filter size of 58mm whereas the Canon EF-M 15-45mm F3.5-6.3 has a 49mm 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 Samyang 21mm F1.4 ED AS UMC CS:
And these are the 49mm filters that we recommend for the Canon EF-M 15-45mm F3.5-6.3:
Lens Mounts
Both the Samyang 21mm F1.4 ED AS UMC CS and the Canon EF-M 15-45mm F3.5-6.3 has the same Canon EF-M lens mount . Some of the latest released cameras that are compatible with the Canon EF-M lenses are Canon M50 II , Canon M200 and Canon M6 MII .
Fujifilm X , Micro Four Thirds and Sony E mounts.
Focal Range
Samyang 21mm F1.4 ED AS UMC CS is a prime lens with fixed focal lenght of 21mm which has an effective (full-frame 35mm equivalent) focal range of
33.6mm when used on a APS-C / DX format camera.
On the other hand, the 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.
