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 18-300mm F3.5-6.3 Di 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 183mm. The Tamron 18-300mm F3.5-6.3 Di with a length of 126mm, is 57mm shorter. Besides being longer, the Tamron 50-400mm F4.5-6.3 VC also has a larger diameter of 89mm compared to the Tamron 18-300mm F3.5-6.3 Di's 76mm diameter.
Below you can find a scaled side-by-side image of Tamron 50-400mm F4.5-6.3 VC and Tamron 18-300mm F3.5-6.3 Di 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 18-300mm F3.5-6.3 Di 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 18-300mm F3.5-6.3 Di weighs 620g, 46% (535g) lighter than the Tamron 50-400mm F4.5-6.3 VC's weight of 1155g.
Filter Threads
Both the Tamron 50-400mm F4.5-6.3 VC and the Tamron 18-300mm F3.5-6.3 Di 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
Both the Tamron 50-400mm F4.5-6.3 VC and the Tamron 18-300mm F3.5-6.3 Di has the same Sony E lens mount . Some of the latest released cameras that are compatible with the Sony E lenses are Sony FX5 , Sony A7R VI and Sony A7 V .
Fujifilm X 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 18-300mm F3.5-6.3 Di has a focal range of 18-300mm and 16.7X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27-450mm when used on a APS-C / DX format camera.
