The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Fujifilm XC 15-45mm F3.5-5.6 OIS PZ and the Sigma 18-50mm F2.8-4.5 DC OS HSM 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. Sigma 18-50mm F2.8-4.5 DC OS HSM is the longer of the two lenses at 89mm. The Fujifilm XC 15-45mm F3.5-5.6 OIS PZ with a length of 44mm, is 45mm shorter. Besides being longer, the Sigma 18-50mm F2.8-4.5 DC OS HSM also has a larger diameter of 74mm compared to the Fujifilm XC 15-45mm F3.5-5.6 OIS PZ's 63mm 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 15-45mm F3.5-5.6 OIS PZ weighs 136g, which means it is 259g (65%) lighter than the Sigma 18-50mm F2.8-4.5 DC OS HSM which has a weight of 395g.
Filter Threads
The Fujifilm XC 15-45mm F3.5-5.6 OIS PZ has a filter size of 52mm whereas the Sigma 18-50mm F2.8-4.5 DC OS HSM has a 67mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 52mm filters that we recommend you to consider for the Fujifilm XC 15-45mm F3.5-5.6 OIS PZ:
And these are the 67mm filters that we recommend for the Sigma 18-50mm F2.8-4.5 DC OS HSM:
Lens Mounts
The Fujifilm XC 15-45mm F3.5-5.6 OIS PZ has the Fujifilm X lens mount whereas the Sigma 18-50mm F2.8-4.5 DC OS HSM has the Pentax KAF3 lens mount. Some of the latest released cameras that are compatible with these mounts are Fujifilm X-T30 III, Fujifilm X-E5 and Fujifilm X-M5 for the Fujifilm X Mount and , and for the Pentax KAF3 Mount.
Sigma 18-50mm F2.8-4.5 DC OS HSM is also available in Canon EF , Sony Alpha, Sigma SA and Nikon F (DX) mounts.
Focal Range
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.
On the other hand, the Sigma 18-50mm F2.8-4.5 DC OS HSM has a focal range of 18-50mm and 2.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27-75mm when used on a APS-C / DX format camera.
