The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon 24mm f2.8 IS USM and the Tamron AF 28-75mm f2.8 XR LD 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 AF 28-75mm f2.8 XR LD is the longer of the two lenses at 92mm. The Canon 24mm f2.8 IS USM with a length of 56mm, is 36mm shorter. Besides being longer, the Tamron AF 28-75mm f2.8 XR LD also has a larger diameter of 73mm compared to the Canon 24mm f2.8 IS USM's 68mm 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 24mm f2.8 IS USM weighs 280g, which means it is 230g (45%) lighter than the Tamron AF 28-75mm f2.8 XR LD which has a weight of 510g.
Filter Threads
The Canon 24mm f2.8 IS USM has a filter size of 58mm whereas the Tamron AF 28-75mm f2.8 XR LD has a 67mm 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 24mm f2.8 IS USM:
And these are the 67mm filters that we recommend for the Tamron AF 28-75mm f2.8 XR LD:
Lens Mounts
Both the Canon 24mm f2.8 IS USM and the Tamron AF 28-75mm f2.8 XR LD 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.
Focal Range
Canon 24mm f2.8 IS USM is a prime lens with fixed focal lenght of 24mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
38.4mm.
On the other hand, the 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.