The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 20-40mm F2.8 VXD and the Tamron 90mm F2.8 VC USD Macro 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 90mm F2.8 VC USD Macro is the longer of the two lenses at 115mm. The Tamron 20-40mm F2.8 VXD with a length of 86mm, is 29mm shorter. Besides being longer, the Tamron 90mm F2.8 VC USD Macro also has a larger diameter of 76mm compared to the Tamron 20-40mm F2.8 VXD's 74mm 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 20-40mm F2.8 VXD weighs 365g, which means it is 185g (33%) lighter than the Tamron 90mm F2.8 VC USD Macro which has a weight of 550g.
Filter Threads
The Tamron 20-40mm F2.8 VXD has a filter size of 67mm whereas the Tamron 90mm F2.8 VC USD Macro has a 58mm 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 20-40mm F2.8 VXD:
And these are the 58mm filters that we recommend for the Tamron 90mm F2.8 VC USD Macro:
Lens Mounts
The Tamron 20-40mm F2.8 VXD has the Sony E lens mount whereas the Tamron 90mm F2.8 VC USD Macro has the Nikon F (FX) lens mount. Some of the latest released cameras that are compatible with these mounts are Sony FX5, Sony A7R VI and Sony A7 V for the Sony E Mount and Nikon D6, Nikon D780 and Nikon D3500 for the Nikon F (FX) Mount.
Tamron 90mm F2.8 VC USD Macro is also available in Canon EF and Sony Alpha mounts.
Focal Range
Tamron 20-40mm F2.8 VXD has a focal range of 20-40mm and
2.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
30 - 60mm.
On the other hand, the Tamron 90mm F2.8 VC USD Macro is a prime lens with fixed focal lenght of 90mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 135mm.
