The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF-S 7.8mm F4 STM Dual and the Olympus ED 12-45mm F4 Pro 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. Olympus ED 12-45mm F4 Pro is the longer of the two lenses at 70mm. The Canon RF-S 7.8mm F4 STM Dual with a length of 42mm, is 28mm shorter. On the other hand, the Canon RF-S 7.8mm F4 STM Dual has a larger diameter of 69mm compared to the Olympus ED 12-45mm F4 Pro's 63mm 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 RF-S 7.8mm F4 STM Dual weighs 131g, which means it is 123g (48%) lighter than the Olympus ED 12-45mm F4 Pro which has a weight of 254g.
Filter Threads
Both the Canon RF-S 7.8mm F4 STM Dual and the Olympus ED 12-45mm F4 Pro have the same Filter thread size of 58mm.
Below are links to the 58mm filters that we recommend you to consider for these lenses:
Lens Mounts
The Canon RF-S 7.8mm F4 STM Dual has the Canon RF lens mount whereas the Olympus ED 12-45mm F4 Pro has the Micro Four Thirds lens mount. Some of the latest released cameras that are compatible with these mounts are Canon R50 V, Canon R100 and Canon R50 for the Canon RF Mount and OM System OM-3 Astro, OM System OM-5 II and OM System OM-3 for the Micro Four Thirds Mount.
Focal Range
Canon RF-S 7.8mm F4 STM Dual is a prime lens with fixed focal lenght of 7.8mm which has an effective (full-frame 35mm equivalent) focal range of
12.8mm when used on a APS-C / DX format camera.
On the other hand, the Olympus ED 12-45mm F4 Pro has a focal range of 12-45mm and 3.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 24-90mm when used on a FourThirds format camera.
