The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 50-400mm F4.5-6.3 VC and the Tamron 70-300 F4.5-6.3 Di III 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 50-400mm F4.5-6.3 VC is the longer of the two lenses at 186mm. The Tamron 70-300 F4.5-6.3 Di III with a length of 148mm, is 38mm shorter. Besides being longer, the Tamron 50-400mm F4.5-6.3 VC also has a larger diameter of 89mm compared to the Tamron 70-300 F4.5-6.3 Di III's 77mm diameter.
Below you can find a scaled side-by-side image of Tamron 50-400mm F4.5-6.3 VC and Tamron 70-300 F4.5-6.3 Di III to get a better idea of how their sizes compare in real life.
Comparison image of the Tamron 50-400mm F4.5-6.3 VC and the Tamron 70-300 F4.5-6.3 Di III Size and Weight 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 70-300 F4.5-6.3 Di III weighs 545g, 53% (635g) lighter than the Tamron 50-400mm F4.5-6.3 VC's weight of 1180g.
Filter Threads
Both the Tamron 50-400mm F4.5-6.3 VC and the Tamron 70-300 F4.5-6.3 Di III have the same Filter thread size of 67mm .
Below are links to the 67mm filters that we recommend you to consider for these lenses:
Lens Mounts
The Tamron 50-400mm F4.5-6.3 VC has the Nikon Z lens mount whereas the Tamron 70-300 F4.5-6.3 Di III has the Sony E lens mount . Some of the latest released cameras that are compatible with these mounts are Nikon ZR , Nikon Z5 II and RED Komodo-X 6K Z for the Nikon Z Mount and Sony FX5 , Sony A7R VI and Sony A7 V for the Sony E Mount.
Focal Range
Tamron 50-400mm F4.5-6.3 VC has a focal range of 50-400mm and
8.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
75 - 600mm .
On the other hand, the Tamron 70-300 F4.5-6.3 Di III 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 .
