The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron AF 28-75mm f2.8 XR LD and the Tamron 24-70mm 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 24-70mm F2.8 Di VC USD G2 is the longer of the two lenses at 111mm. The Tamron AF 28-75mm f2.8 XR LD with a length of 92mm, is 19mm shorter. Besides being longer, the Tamron 24-70mm F2.8 Di VC USD G2 also has a larger diameter of 88mm compared to the Tamron AF 28-75mm f2.8 XR LD's 73mm 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. Tamron AF 28-75mm f2.8 XR LD weighs 510g, which means it is 395g (43%) lighter than the Tamron 24-70mm F2.8 Di VC USD G2 which has a weight of 905g.
Below you can find the dimension and weight table of the Standard Zoom Lenses in Canon EF Mount for size comparison purposes.
Standard Lenses in Canon EF Mount for Size Comparison
Filter Threads
The Tamron AF 28-75mm f2.8 XR LD has a filter size of 67mm whereas the Tamron 24-70mm F2.8 Di VC USD G2 has a 82mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Tamron AF 28-75mm f2.8 XR LD:
And these are the 82mm filters that we recommend for the Tamron 24-70mm F2.8 Di VC USD G2:
Lens Mounts
Both the Tamron AF 28-75mm f2.8 XR LD and the Tamron 24-70mm F2.8 Di VC USD G2 has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Canon 1D X III, Canon 6D MII and Canon 5D MIV.
Tamron AF 28-75mm f2.8 XR LD is also available in Nikon F (FX) , Sony Alpha and Pentax KAF mounts.
Tamron 24-70mm F2.8 Di VC USD G2 is also available in Nikon F (FX) mount.
Focal Range
Tamron AF 28-75mm f2.8 XR LD has a focal range of 28-75mm and
2.7X 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 - 120mm.
On the other hand, the Tamron 24-70mm F2.8 Di VC USD G2 has a focal range of 24-70mm and 2.9X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 38.4 - 112mm.