The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Fujifilm XF 10-24mm F4 R and the Pentax 17-70mm F4.0 AL SDM 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. Pentax 17-70mm F4.0 AL SDM is the longer of the two lenses at 94mm. The Fujifilm XF 10-24mm F4 R with a length of 87mm, is 7mm shorter. On the other hand, the Fujifilm XF 10-24mm F4 R has a larger diameter of 78mm compared to the Pentax 17-70mm F4.0 AL SDM'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 10-24mm F4 R weighs 410g, which means it is 75g (15%) lighter than the Pentax 17-70mm F4.0 AL SDM which has a weight of 485g.
Filter Threads
The Fujifilm XF 10-24mm F4 R has a filter size of 72mm whereas the Pentax 17-70mm F4.0 AL SDM 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 72mm filters that we recommend you to consider for the Fujifilm XF 10-24mm F4 R:
And these are the 67mm filters that we recommend for the Pentax 17-70mm F4.0 AL SDM:
Lens Mounts
The Fujifilm XF 10-24mm F4 R has the Fujifilm X lens mount whereas the Pentax 17-70mm F4.0 AL SDM 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.
Focal Range
Fujifilm XF 10-24mm F4 R has a focal range of 10-24mm and
2.4X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
15-36mm when used on a APS-C / DX format camera.
On the other hand, the Pentax 17-70mm F4.0 AL SDM 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.
