The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony FE 20-70mm F4 G and the Panasonic S 20-60mm F3.5-5.6 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. Sony FE 20-70mm F4 G is the longer of the two lenses at 99mm. The Panasonic S 20-60mm F3.5-5.6 with a length of 87mm, is 12mm shorter. Besides being longer, the Sony FE 20-70mm F4 G also has a larger diameter of 79mm compared to the Panasonic S 20-60mm F3.5-5.6's 77mm diameter.
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Below you can find a scaled side-by-side image of Sony FE 20-70mm F4 G and Panasonic S 20-60mm F3.5-5.6 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. Panasonic S 20-60mm F3.5-5.6 weighs 350g, 28% (138g) lighter than the Sony FE 20-70mm F4 G's weight of 488g.
Filter Threads
The Sony FE 20-70mm F4 G has a filter size of 72mm whereas the Panasonic S 20-60mm F3.5-5.6 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 Sony FE 20-70mm F4 G:
And these are the 67mm filters that we recommend for the Panasonic S 20-60mm F3.5-5.6:
Lens Mounts
The Sony FE 20-70mm F4 G has the Sony E lens mount whereas the Panasonic S 20-60mm F3.5-5.6 has the Leica L lens mount. Some of the latest released cameras that are compatible with these mounts are Sony A9 III, Sony A7C Mark II and Sony A7CR for the Sony E Mount and Leica SL3, Panasonic S5 II and Panasonic S5 II X for the Leica L Mount.
Focal Range
Sony FE 20-70mm F4 G has a focal range of 20-70mm and
3.5X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
30 - 105mm.
On the other hand, the Panasonic S 20-60mm F3.5-5.6 has a focal range of 20-60mm and 3.0X zoom ratio .