The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Fujifilm XF 70-300 F4-5.6 R and the Fujifilm Fujinon MKX 50-135mm T2.9 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. Fujifilm Fujinon MKX 50-135mm T2.9 is the longer of the two lenses at 207mm. The Fujifilm XF 70-300 F4-5.6 R with a length of 133mm, is 74mm shorter. Besides being longer, the Fujifilm Fujinon MKX 50-135mm T2.9 also has a larger diameter of 87mm compared to the Fujifilm XF 70-300 F4-5.6 R's 75mm 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 XF 70-300 F4-5.6 R weighs 580g, which means it is 500g (46%) lighter than the Fujifilm Fujinon MKX 50-135mm T2.9 which has a weight of 1080g.
Filter Threads
The Fujifilm XF 70-300 F4-5.6 R has a filter size of 67mm whereas the Fujifilm Fujinon MKX 50-135mm T2.9 has a 82mm 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 Fujifilm XF 70-300 F4-5.6 R:
And these are the 82mm filters that we recommend for the Fujifilm Fujinon MKX 50-135mm T2.9:
Lens Mounts
Both the Fujifilm XF 70-300 F4-5.6 R and the Fujifilm Fujinon MKX 50-135mm T2.9 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.
Focal Range
Fujifilm XF 70-300 F4-5.6 R has a focal range of 70-300mm and
4.3X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
105-450mm when used on a APS-C / DX format camera.
On the other hand, the Fujifilm Fujinon MKX 50-135mm T2.9 has a focal range of 50-135mm and 2.7X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 75-202.5mm when used on a 35mm FF format camera.