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 50-300mm F4.5-6.3 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 50-300mm F4.5-6.3 with a length of 150mm, is 36mm shorter. Besides being longer, the Tamron 50-400mm F4.5-6.3 VC also has a larger diameter of 89mm compared to the Tamron 50-300mm F4.5-6.3's 78mm diameter.
Below you can find a scaled side-by-side image of Tamron 50-400mm F4.5-6.3 VC and Tamron 50-300mm F4.5-6.3 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 50-300mm F4.5-6.3 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 50-300mm F4.5-6.3 weighs 665g, 43% (515g) 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 50-300mm F4.5-6.3 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 50-300mm F4.5-6.3 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.
Tamron 50-400mm F4.5-6.3 VC is also available in 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 50-300mm F4.5-6.3 has a focal range of 50-300mm and 6.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 75 - 450mm .