The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron AF 28-80mm f3.5-5.6 and the Canon 18-55mm f3.5-5.6 IS for their suitability to various photography scenarios:
Size and Weight Comparison
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 18-55mm f3.5-5.6 IS weighs 200g, 15% (37g) lighter than the Tamron AF 28-80mm f3.5-5.6's weight of 237g.
Filter Threads
Both the Tamron AF 28-80mm f3.5-5.6 and the Canon 18-55mm f3.5-5.6 IS 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 Tamron AF 28-80mm f3.5-5.6 has the Pentax KAF lens mount whereas the Canon 18-55mm f3.5-5.6 IS has the Canon EF-S lens mount. Some of the latest released cameras that are compatible with these mounts are Pentax K-3 III Mono, Pentax KF and Pentax K-3 III for the Pentax KAF Mount and Canon T8i, Canon 90D and Canon SL3 for the Canon EF-S Mount.
Tamron AF 28-80mm f3.5-5.6 is also available in the Canon EF , Nikon F (FX) and Sony Alpha mounts.
Focal Range
Tamron AF 28-80mm f3.5-5.6 has a focal range of 28-80mm and
2.9X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
42 - 120mm.
On the other hand, the Canon 18-55mm f3.5-5.6 IS has a focal range of 18-55mm and 3.1X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 28.8-88mm when used on a APS-C / DX format camera.
