The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 70-300mm f4-5.6 VC USD and the Nikon 85mm f1.8G 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 70-300mm f4-5.6 VC USD is the longer of the two lenses at 143mm. The Nikon 85mm f1.8G with a length of 73mm, is 70mm shorter. Besides being longer, the Tamron 70-300mm f4-5.6 VC USD also has a larger diameter of 82mm compared to the Nikon 85mm f1.8G'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. Nikon 85mm f1.8G weighs 350g, 54% (415g) lighter than the Tamron 70-300mm f4-5.6 VC USD's weight of 765g.
The Tamron 70-300mm f4-5.6 VC USD has a filter size of 62mm whereas the Nikon 85mm f1.8G 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 62mm filters that we recommend you to consider for the Tamron 70-300mm f4-5.6 VC USD:
And these are the 67mm filters that we recommend for the Nikon 85mm f1.8G:
Both the Tamron 70-300mm f4-5.6 VC USD and the Nikon 85mm f1.8G has the same Nikon F (FX) lens mount. Some of the latest released cameras that are compatible with the Nikon F (FX) lenses are Nikon D6, Nikon D780 and Nikon D3500.
Tamron 70-300mm f4-5.6 VC USD is also available in Canon EF mount.
Tamron 70-300mm f4-5.6 VC USD has a focal range of 70-300mm and 4.3X
zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 105 - 450mm
On the other hand, the Nikon 85mm f1.8G is a prime lens with fixed focal lenght of 85mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 127.5mm.