The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 17-50mm f4 Di III VXD and the Tamron 11-20mm F2.8 A 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 17-50mm f4 Di III VXD is the longer of the two lenses at 114mm. The Tamron 11-20mm F2.8 A with a length of 86mm, is 28mm shorter. Besides being longer, the Tamron 17-50mm f4 Di III VXD also has a larger diameter of 75mm compared to the Tamron 11-20mm F2.8 A's 73mm diameter.
Below you can find a scaled side-by-side image of Tamron 17-50mm f4 Di III VXD and Tamron 11-20mm F2.8 A to get a better idea of how their sizes compare in real life.
Comparison image of the Tamron 17-50mm f4 Di III VXD and the Tamron 11-20mm F2.8 A 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 11-20mm F2.8 A weighs 335g, 27% (125g) lighter than the Tamron 17-50mm f4 Di III VXD's weight of 460g.
Below you can find the dimension and weight table of the Wideangle Zoom Lenses in Sony E Mount for size comparison purposes.
Ultra-Wideangle Sony E Mount
Filter Threads
Both the Tamron 17-50mm f4 Di III VXD and the Tamron 11-20mm F2.8 A 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 17-50mm f4 Di III VXD and the Tamron 11-20mm F2.8 A 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 17-50mm f4 Di III VXD has a focal range of 17-50mm and
3.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
25.5 - 75mm .
On the other hand, the Tamron 11-20mm F2.8 A has a focal range of 11-20mm and 1.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 16.5-30mm when used on a APS-C / DX format camera.
