The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon 28-105mm f3.5-4.5 II and the Tamron 18-270mm f3.5-6.3 II VC PZD 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. Tamron 18-270mm f3.5-6.3 II VC PZD is the longer of the two lenses at 88mm. The Canon 28-105mm f3.5-4.5 II with a length of 75mm, is 13mm shorter. Besides being longer, the Tamron 18-270mm f3.5-6.3 II VC PZD also has a larger diameter of 74mm compared to the Canon 28-105mm f3.5-4.5 II's 72mm 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 28-105mm f3.5-4.5 II weighs 375g, which means it is 75g (16%) lighter than the Tamron 18-270mm f3.5-6.3 II VC PZD which has a weight of 450g.
Filter Threads
The Canon 28-105mm f3.5-4.5 II has a filter size of 58mm whereas the Tamron 18-270mm f3.5-6.3 II VC PZD has a 62mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 58mm filters that we recommend you to consider for the Canon 28-105mm f3.5-4.5 II:
And these are the 62mm filters that we recommend for the Tamron 18-270mm f3.5-6.3 II VC PZD:
Lens Mounts
The Canon 28-105mm f3.5-4.5 II has the Canon EF lens mount whereas the Tamron 18-270mm f3.5-6.3 II VC PZD has the Nikon F (DX) lens mount. Some of the latest released cameras that are compatible with these mounts are Blackmagic URSA 12K LF, Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K for the Canon EF Mount and Nikon D3500, Nikon D7500 and Nikon D5600 for the Nikon F (DX) Mount.
Tamron 18-270mm f3.5-6.3 II VC PZD is also available in Canon EF mount.
Focal Range
Canon 28-105mm f3.5-4.5 II has a focal range of 28-105mm and
3.8X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
44.8 - 168mm.
On the other hand, the Tamron 18-270mm f3.5-6.3 II VC PZD has a focal range of 18-270mm and 15.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27-405mm when used on a APS-C / DX format camera.
