The type of photography that you are planning to use is an important decision factor. Here we have evaluated the OM System 25mm F1.8 II and the Canon 16-35mm F2.8L III 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 16-35mm F2.8L III is the longer of the two lenses at 128mm. The OM System 25mm F1.8 II with a length of 41mm, is 87mm shorter. Besides being longer, the Canon 16-35mm F2.8L III also has a larger diameter of 89mm compared to the OM System 25mm F1.8 II's 56mm diameter.
Below you can find a scaled side-by-side image of OM System 25mm F1.8 II and Canon 16-35mm F2.8L III to get a better idea of how their sizes compare in real life.
Comparison image of the OM System 25mm F1.8 II and the Canon 16-35mm F2.8L III 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. OM System 25mm F1.8 II weighs 156g, which means it is 634g (80%) lighter than the Canon 16-35mm F2.8L III which has a weight of 790g.
Filter Threads
The OM System 25mm F1.8 II has a filter size of 46mm whereas the Canon 16-35mm F2.8L III has a 82mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 46mm filters that we recommend you to consider for the OM System 25mm F1.8 II:
And these are the 82mm filters that we recommend for the Canon 16-35mm F2.8L III:
Lens Mounts
The OM System 25mm F1.8 II has the Micro Four Thirds lens mount whereas the Canon 16-35mm F2.8L III has the Canon EF lens mount . Some of the latest released cameras that are compatible with these mounts are OM System OM-3 Astro , OM System OM-5 II and OM System OM-3 for the Micro Four Thirds Mount and Blackmagic URSA 12K LF , Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K for the Canon EF Mount.
Focal Range
OM System 25mm F1.8 II is a prime lens with fixed focal lenght of 25mm which has an effective (full-frame 35mm equivalent) focal range of
50mm when used on a FourThirds format camera.
On the other hand, the Canon 16-35mm F2.8L III has a focal range of 16-35mm and 2.2X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 25.6 - 56mm .
