The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 28-300mm F4-7.1 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 70-300 F4.5-6.3 Di III is the longer of the two lenses at 148mm. The Tamron 28-300mm F4-7.1 with a length of 126mm, is 22mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 77mm.
Below you can find a scaled side-by-side image of Tamron 28-300mm F4-7.1 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 28-300mm F4-7.1 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, 10% (65g) lighter than the Tamron 28-300mm F4-7.1's weight of 610g.
Filter Threads
Both the Tamron 28-300mm F4-7.1 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
Both the Tamron 28-300mm F4-7.1 and the Tamron 70-300 F4.5-6.3 Di III 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 .
Focal Range
Tamron 28-300mm F4-7.1 has a focal range of 28-300mm and
10.7X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
42 - 450mm .
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 .
