The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 24-70mm f2.8 VC USD and the Nikon 18-70mm f3.5-4.5G ED-IF 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 Nikon 18-70mm f3.5-4.5G ED-IF with a length of 76mm, is 41mm shorter. Besides being longer, the Tamron 24-70mm f2.8 VC USD also has a larger diameter of 88mm compared to the Nikon 18-70mm f3.5-4.5G ED-IF'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. Nikon 18-70mm f3.5-4.5G ED-IF weighs 420g, 49% (405g) lighter than the Tamron 24-70mm f2.8 VC USD's weight of 825g.
Filter Threads
The Tamron 24-70mm f2.8 VC USD has a filter size of 82mm whereas the Nikon 18-70mm f3.5-4.5G ED-IF 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 82mm filters that we recommend you to consider for the Tamron 24-70mm f2.8 VC USD:
And these are the 67mm filters that we recommend for the Nikon 18-70mm f3.5-4.5G ED-IF:
Lens Mounts
The Tamron 24-70mm f2.8 VC USD has the Nikon F (FX) lens mount whereas the Nikon 18-70mm f3.5-4.5G ED-IF has the Nikon F (DX) lens mount. Some of the latest released cameras that are compatible with these mounts are Nikon D6, Nikon D780 and Nikon D3500 for the Nikon F (FX) Mount and Nikon D3500, Nikon D7500 and Nikon D5600 for the Nikon F (DX) Mount.
Tamron 24-70mm f2.8 VC USD is also available in the Canon EF and Sony Alpha mounts.
Focal Range
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.
On the other hand, the Nikon 18-70mm f3.5-4.5G ED-IF has a focal range of 18-70mm and 3.9X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27-105mm when used on a APS-C / DX format camera.
