The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Olympus ED 7-14mm F2.8 PRO and the Canon 15-85mm f3.5-5.6 IS USM 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 7-14mm F2.8 PRO is the longer of the two lenses at 106mm. The Canon 15-85mm f3.5-5.6 IS USM with a length of 88mm, is 18mm shorter. On the other hand, the Canon 15-85mm f3.5-5.6 IS USM has a larger diameter of 82mm compared to the Olympus ED 7-14mm F2.8 PRO's 79mm 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. Olympus ED 7-14mm F2.8 PRO weighs 534g, which means it is 41g (7%) lighter than the Canon 15-85mm f3.5-5.6 IS USM which has a weight of 575g.
Lens Mounts
The Olympus ED 7-14mm F2.8 PRO has the Micro Four Thirds lens mount whereas the Canon 15-85mm f3.5-5.6 IS USM has the Canon EF-S 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 Canon T8i, Canon 90D and Canon SL3 for the Canon EF-S Mount.
Focal Range
Olympus ED 7-14mm F2.8 PRO has a focal range of 7-14mm and
2.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
14-28mm when used on a FourThirds format camera.
On the other hand, the Canon 15-85mm f3.5-5.6 IS USM has a focal range of 15-85mm and 5.7X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 24-136mm when used on a APS-C / DX format camera.
