The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 17-70 F2.8 Di III-A VC and the Fujifilm XC 50-230mm F4.5-6.7 OIS 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 17-70 F2.8 Di III-A VC is the longer of the two lenses at 119mm. The Fujifilm XC 50-230mm F4.5-6.7 OIS with a length of 111mm, is 8mm shorter. Besides being longer, the Tamron 17-70 F2.8 Di III-A VC also has a larger diameter of 75mm compared to the Fujifilm XC 50-230mm F4.5-6.7 OIS's 69mm diameter.
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 XC 50-230mm F4.5-6.7 OIS weighs 375g, 28% (150g) lighter than the Tamron 17-70 F2.8 Di III-A VC's weight of 525g.
Filter Threads
The Tamron 17-70 F2.8 Di III-A VC has a filter size of 67mm whereas the Fujifilm XC 50-230mm F4.5-6.7 OIS 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 17-70 F2.8 Di III-A VC:
And these are the 58mm filters that we recommend for the Fujifilm XC 50-230mm F4.5-6.7 OIS:
Lens Mounts
Both the Tamron 17-70 F2.8 Di III-A VC and the Fujifilm XC 50-230mm F4.5-6.7 OIS has the same Fujifilm X lens mount. Some of the latest released cameras that are compatible with the Fujifilm X lenses are Fujifilm X-T30 III, Fujifilm X-E5 and Fujifilm X-M5.
Tamron 17-70 F2.8 Di III-A VC is also available in the Sony E mount.
Focal Range
Tamron 17-70 F2.8 Di III-A VC has a focal range of 17-70mm and
4.1X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
25.5-105mm when used on a APS-C / DX format camera.
On the other hand, the Fujifilm XC 50-230mm F4.5-6.7 OIS has a focal range of 50-230mm and 4.6X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 75-345mm when used on a APS-C / DX format camera.
