The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 11-20mm F2.8 Di III-A and the Fujifilm 14mm F2.8 R 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 11-20mm F2.8 Di III-A is the longer of the two lenses at 86mm. The Fujifilm 14mm F2.8 R with a length of 58mm, is 28mm shorter. Besides being longer, the Tamron 11-20mm F2.8 Di III-A also has a larger diameter of 73mm compared to the Fujifilm 14mm F2.8 R's 65mm diameter.
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Below you can find a scaled side-by-side image of Tamron 11-20mm F2.8 Di III-A and Fujifilm 14mm F2.8 R to get a better idea of how their sizes compare in real life.
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. Fujifilm 14mm F2.8 R weighs 235g, 29% (100g) lighter than the Tamron 11-20mm F2.8 Di III-A's weight of 335g.
Filter Threads
The Tamron 11-20mm F2.8 Di III-A has a filter size of 67mm whereas the Fujifilm 14mm F2.8 R has a 58mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Tamron 11-20mm F2.8 Di III-A:
And these are the 58mm filters that we recommend for the Fujifilm 14mm F2.8 R:
Lens Mounts
Both the Tamron 11-20mm F2.8 Di III-A and the Fujifilm 14mm F2.8 R has the same Fujifilm X lens mount. Some of the latest released cameras that are compatible with the Fujifilm X lenses are Fujifilm X-S20, Fujifilm X-T5 and Fujifilm X-H2.
Tamron 11-20mm F2.8 Di III-A is also available in Sony E mount.
Focal Range
Tamron 11-20mm F2.8 Di III-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.
On the other hand, the Fujifilm 14mm F2.8 R is a prime lens with fixed focal lenght of 14mm which has an effective (full-frame 35mm equivalent) focal range of 21mm when used on a APS-C / DX format camera.