The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 45mm F1.8 Di VC USD and the Tamron 24-70mm f2.8 VC USD 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 VC USD is the longer of the two lenses at 117mm. The Tamron 45mm F1.8 Di VC USD with a length of 92mm, is 25mm shorter. Besides being longer, the Tamron 24-70mm f2.8 VC USD also has a larger diameter of 88mm compared to the Tamron 45mm F1.8 Di VC USD's 80mm 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 45mm F1.8 Di VC USD weighs 520g, which means it is 305g (36%) lighter than the Tamron 24-70mm f2.8 VC USD which has a weight of 825g.
Filter Threads
The Tamron 45mm F1.8 Di VC USD has a filter size of 67mm whereas the Tamron 24-70mm f2.8 VC USD 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 45mm F1.8 Di VC USD:
And these are the 82mm filters that we recommend for the Tamron 24-70mm f2.8 VC USD:
Lens Mounts
Both the Tamron 45mm F1.8 Di VC USD and the Tamron 24-70mm f2.8 VC USD has the same Sony Alpha lens mount. Some of the latest released cameras that are compatible with the Sony Alpha lenses are Sony A99 II, Sony A68 and Sony A77 II.
Tamron 45mm F1.8 Di VC USD is also available in the Canon EF and Nikon F (FX) mounts.
Tamron 24-70mm f2.8 VC USD is also available in Canon EF and Nikon F (FX) mounts.
Focal Range
Tamron 45mm F1.8 Di VC USD is a prime lens with fixed focal lenght of 45mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
67.5mm.
On the other hand, the Tamron 24-70mm f2.8 VC USD has a focal range of 24-70mm 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 36 - 105mm.
