The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Fujifilm 18-55mm F2.8-4 R LM OIS and the Fujifilm XC 15-45mm F3.5-5.6 OIS PZ 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 18-55mm F2.8-4 R LM OIS is the longer of the two lenses at 70mm. The Fujifilm XC 15-45mm F3.5-5.6 OIS PZ with a length of 44mm, is 26mm shorter. Besides being longer, the Fujifilm 18-55mm F2.8-4 R LM OIS also has a larger diameter of 65mm compared to the Fujifilm XC 15-45mm F3.5-5.6 OIS PZ's 63mm diameter.
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Below you can find a scaled side-by-side image of Fujifilm 18-55mm F2.8-4 R LM OIS and Fujifilm XC 15-45mm F3.5-5.6 OIS PZ 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 XC 15-45mm F3.5-5.6 OIS PZ weighs 136g, 56% (174g) lighter than the Fujifilm 18-55mm F2.8-4 R LM OIS's weight of 310g.
Below you can find the dimension and weight table of the Standard Zoom Lenses in Fujifilm X Mount for size comparison purposes.
Standard Lenses in Fujifilm X Mount for Size Comparison
Filter Threads
The Fujifilm 18-55mm F2.8-4 R LM OIS has a filter size of 58mm whereas the Fujifilm XC 15-45mm F3.5-5.6 OIS PZ has a 52mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 58mm filters that we recommend you to consider for the Fujifilm 18-55mm F2.8-4 R LM OIS:
And these are the 52mm filters that we recommend for the Fujifilm XC 15-45mm F3.5-5.6 OIS PZ:
Lens Mounts
Both the Fujifilm 18-55mm F2.8-4 R LM OIS and the Fujifilm XC 15-45mm F3.5-5.6 OIS PZ 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 18-55mm F2.8-4 R LM OIS has a focal range of 18-55mm and
3.1X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
27-82.5mm when used on a APS-C / DX format camera.
On the other hand, the Fujifilm XC 15-45mm F3.5-5.6 OIS PZ has a focal range of 15-45mm and 3.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 22.5-67.5mm when used on a APS-C / DX format camera.