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 Panasonic S 24-105mm F4 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. Panasonic S 24-105mm F4 is the longer of the two lenses at 118mm. The Pentax 17-70mm F4.0 AL SDM with a length of 94mm, is 24mm shorter. Besides being longer, the Panasonic S 24-105mm F4 also has a larger diameter of 84mm 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. Pentax 17-70mm F4.0 AL SDM weighs 485g, which means it is 195g (28%) lighter than the Panasonic S 24-105mm F4 which has a weight of 680g.
Filter Threads
The Pentax 17-70mm F4.0 AL SDM has a filter size of 67mm whereas the Panasonic S 24-105mm F4 has a 77mm 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 77mm filters that we recommend for the Panasonic S 24-105mm F4:
Lens Mounts
The Pentax 17-70mm F4.0 AL SDM has the Pentax KAF3 lens mount whereas the Panasonic S 24-105mm F4 has the Leica L lens mount. Some of the latest released cameras that are compatible with these mounts are , and for the Pentax KAF3 Mount and Leica SL3-P, Panasonic S1 II and Panasonic S1 IIE for the Leica L 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 Panasonic S 24-105mm F4 has a focal range of 24-105mm and 4.4X zoom ratio .
