The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 24-70 F2.8 DG DN Art and the Sigma 17-70mm F2.8-4 DC OS HSM C 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. Sigma 24-70 F2.8 DG DN Art is the longer of the two lenses at 123mm. The Sigma 17-70mm F2.8-4 DC OS HSM C with a length of 82mm, is 41mm shorter. Besides being longer, the Sigma 24-70 F2.8 DG DN Art also has a larger diameter of 88mm compared to the Sigma 17-70mm F2.8-4 DC OS HSM C's 79mm 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. Sigma 17-70mm F2.8-4 DC OS HSM C weighs 465g, 44% (370g) lighter than the Sigma 24-70 F2.8 DG DN Art's weight of 835g.
Filter Threads
The Sigma 24-70 F2.8 DG DN Art has a filter size of 82mm whereas the Sigma 17-70mm F2.8-4 DC OS HSM C 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 82mm filters that we recommend you to consider for the Sigma 24-70 F2.8 DG DN Art:
And these are the 72mm filters that we recommend for the Sigma 17-70mm F2.8-4 DC OS HSM C:
Lens Mounts
The Sigma 24-70 F2.8 DG DN Art has the Sony E lens mount whereas the Sigma 17-70mm F2.8-4 DC OS HSM C has the Sigma SA 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 Sigma SD1 Merrill, Sigma SD1 and for the Sigma SA Mount.
Sigma 24-70 F2.8 DG DN Art is also available in the Leica L mount.
Sigma 17-70mm F2.8-4 DC OS HSM C is also available in Canon EF , Pentax KAF3, Sony Alpha and Nikon F (DX) mounts.
Focal Range
Sigma 24-70 F2.8 DG DN Art has a focal range of 24-70mm and
2.9X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
36 - 105mm.
On the other hand, the Sigma 17-70mm F2.8-4 DC OS HSM C 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.
