The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 12-20mm f2.8 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 12-20mm f2.8 is the longer of the two lenses at 119mm. The Tamron 11-20mm F2.8 A with a length of 86mm, is 33mm shorter. Besides being longer, the Tamron 12-20mm f2.8 also has a larger diameter of 90mm compared to the Tamron 11-20mm F2.8 A's 73mm diameter.
Below you can find a scaled side-by-side image of Tamron 12-20mm f2.8 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 12-20mm f2.8 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, 41% (235g) lighter than the Tamron 12-20mm f2.8's weight of 570g.
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 12-20mm f2.8 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 12-20mm f2.8 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 12-20mm f2.8 has a focal range of 12-20mm and
1.7X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
18 - 30mm .
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.
