The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Fujifilm XF 18-120mm F4 and the Fujifilm 18-135mm F3.5-5.6 R OIS for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Fujifilm XF 18-120mm F4 is the longer of the two lenses at 124mm. The Fujifilm 18-135mm F3.5-5.6 R OIS with a length of 98mm is 26mm shorter. Besides being longer, the Fujifilm XF 18-120mm F4 also has a larger diameter of 77mm compared to Fujifilm 18-135mm F3.5-5.6 R OIS's 76mm diameter.
Below you can find the scaled side by side image of Fujifilm XF 18-120mm F4 and Fujifilm 18-135mm F3.5-5.6 R OIS to get a better idea of how their size compare in real life.
Comparison image of Fujifilm XF 18-120mm F4 and Fujifilm 18-135mm F3.5-5.6 R OIS Size and Weight Weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Fujifilm XF 18-120mm F4 weighs 460g, which means it is 30g (6%) lighter than the Fujifilm 18-135mm F3.5-5.6 R OIS which has a weight of 490g.
Lens Mounts
Both Fujifilm XF 18-120mm F4 and Fujifilm 18-135mm F3.5-5.6 R 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-T5, Fujifilm X-H2 and Fujifilm X-H2S.
Focal Range
Fujifilm XF 18-120mm F4 has a focal range of 18-120mm and 6.7X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27-180mm when used on a APS-C / DX format camera. Fujifilm 18-135mm F3.5-5.6 R OIS has a focal range of 18-135mm and 7.5X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27-202.5mm when used on a APS-C / DX format camera.