The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 15-35mm F2.8L IS USM and the Tamron SP 15-30mm F2.8 Di VC USD G2 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 SP 15-30mm F2.8 Di VC USD G2 is the longer of the two lenses at 145mm. The Canon RF 15-35mm F2.8L IS USM with a length of 127mm, is 18mm shorter. Besides being longer, the Tamron SP 15-30mm F2.8 Di VC USD G2 also has a larger diameter of 98mm compared to the Canon RF 15-35mm F2.8L IS USM's 89mm 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 15-35mm F2.8L IS USM weighs 840g, which means it is 270g (24%) lighter than the Tamron SP 15-30mm F2.8 Di VC USD G2 which has a weight of 1110g.
Lens Mounts
The Canon RF 15-35mm F2.8L IS USM has the Canon RF lens mount whereas the Tamron SP 15-30mm F2.8 Di VC USD G2 has the Canon EF lens mount. Some of the latest released cameras that are compatible with these mounts are Canon R100, Canon R8 and Canon R50 for the Canon RF Mount and Canon 1D X III, Canon 6D MII and Canon 5D MIV for the Canon EF Mount.
Tamron SP 15-30mm F2.8 Di VC USD G2 is also available in Nikon F (FX) mount.
Focal Range
Canon RF 15-35mm F2.8L IS USM has a focal range of 15-35mm and
2.3X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
24 - 56mm.
On the other hand, the Tamron SP 15-30mm F2.8 Di VC USD G2 has a focal range of 15-30mm and 2.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 24 - 48mm.