The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Pentax smc 16-50mm F2.8 ED and the Canon 17-55mm f2.8 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. Canon 17-55mm f2.8 IS USM is the longer of the two lenses at 111mm. The Pentax smc 16-50mm F2.8 ED with a length of 99mm, is 12mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 84mm.
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. Pentax smc 16-50mm F2.8 ED weighs 565g, which means it is 80g (12%) lighter than the Canon 17-55mm f2.8 IS USM which has a weight of 645g.
Filter Threads
Both the Pentax smc 16-50mm F2.8 ED and the Canon 17-55mm f2.8 IS USM have the same Filter thread size of 77mm.
Below are links to the 77mm filters that we recommend you to consider for these lenses:
Lens Mounts
The Pentax smc 16-50mm F2.8 ED has the Pentax KAF2 lens mount whereas the Canon 17-55mm f2.8 IS USM has the Canon EF-S lens mount. Some of the latest released cameras that are compatible with these mounts are , and for the Pentax KAF2 Mount and Canon T8i, Canon 90D and Canon SL3 for the Canon EF-S Mount.
Focal Range
Pentax smc 16-50mm F2.8 ED has a focal range of 16-50mm and
3.1X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
24-75mm when used on a APS-C / DX format camera.
On the other hand, the Canon 17-55mm f2.8 IS USM has a focal range of 17-55mm and 3.2X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27.2-88mm when used on a APS-C / DX format camera.
