The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony FE 28-70mm F3.5-5.6 II and the Canon RF 24-105mm F4.0-7.1 IS 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. Canon RF 24-105mm F4.0-7.1 IS is the longer of the two lenses at 89mm. The Sony FE 28-70mm F3.5-5.6 II with a length of 83mm, is 6mm shorter. Besides being longer, the Canon RF 24-105mm F4.0-7.1 IS also has a larger diameter of 77mm compared to the Sony FE 28-70mm F3.5-5.6 II's 73mm 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. Sony FE 28-70mm F3.5-5.6 II weighs 295g, which means it is 100g (25%) lighter than the Canon RF 24-105mm F4.0-7.1 IS which has a weight of 395g.
Filter Threads
The Sony FE 28-70mm F3.5-5.6 II has a filter size of 55mm whereas the Canon RF 24-105mm F4.0-7.1 IS 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 55mm filters that we recommend you to consider for the Sony FE 28-70mm F3.5-5.6 II:
And these are the 67mm filters that we recommend for the Canon RF 24-105mm F4.0-7.1 IS:
Lens Mounts
The Sony FE 28-70mm F3.5-5.6 II has the Sony E lens mount whereas the Canon RF 24-105mm F4.0-7.1 IS has the Canon RF lens mount. Some of the latest released cameras that are compatible with these mounts are Sony FX5, Sony A7R VI and Sony A7 V for the Sony E Mount and Canon R6 V, Canon R6 III and Canon C50 for the Canon RF Mount.
Focal Range
Sony FE 28-70mm F3.5-5.6 II has a focal range of 28-70mm and
2.5X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
42 - 105mm.
On the other hand, the Canon RF 24-105mm F4.0-7.1 IS has a focal range of 24-105mm and 4.4X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 38.4 - 168mm.
