The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Pentax 17-70mm F4.0 AL SDM and the Fujifilm XF 10-24mm F4 R 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, 15% (75g) lighter than the Pentax 17-70mm F4.0 AL SDM's weight of 485g.
Filter Threads
The Pentax 17-70mm F4.0 AL SDM has a filter size of 67mm whereas the Fujifilm XF 10-24mm F4 R has a 72mm 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 Pentax 17-70mm F4.0 AL SDM:
And these are the 72mm filters that we recommend for the Fujifilm XF 10-24mm F4 R:
Lens Mounts
The Pentax 17-70mm F4.0 AL SDM has the Pentax KAF3 lens mount whereas the Fujifilm XF 10-24mm F4 R has the Fujifilm X lens mount. Some of the latest released cameras that are compatible with these mounts are , and for the Pentax KAF3 Mount and Fujifilm X-T30 III, Fujifilm X-E5 and Fujifilm X-M5 for the Fujifilm X Mount.
Focal Range
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.
On the other hand, the 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.
