The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 17-40mm f1.8 and the Sigma 28-70mm F2.8 DG DN 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 17-40mm f1.8 is the longer of the two lenses at 116mm. The Sigma 28-70mm F2.8 DG DN C with a length of 102mm, is 14mm shorter. Besides being longer, the Sigma 17-40mm f1.8 also has a larger diameter of 73mm compared to the Sigma 28-70mm F2.8 DG DN C's 72mm diameter.
Below you can find a scaled side-by-side image of Sigma 17-40mm f1.8 and Sigma 28-70mm F2.8 DG DN C to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 17-40mm f1.8 and the Sigma 28-70mm F2.8 DG DN C Size and Weight 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 28-70mm F2.8 DG DN C weighs 470g, 12% (65g) lighter than the Sigma 17-40mm f1.8's weight of 535g.
Filter Threads
Both the Sigma 17-40mm f1.8 and the Sigma 28-70mm F2.8 DG DN C have the same Filter thread size of 67mm .
Below are links to the 67mm filters that we recommend you to consider for these lenses:
Lens Mounts
The Sigma 17-40mm f1.8 has the Sony E lens mount whereas the Sigma 28-70mm F2.8 DG DN C has the Leica L lens mount . Some of the latest released cameras that are compatible with these mounts are Sony ZV-E10 II , Sony A6700 and Sony FX30 for the Sony E Mount and Leica SL3-P , Panasonic S1 II and Panasonic S1 IIE for the Leica L Mount.
Leica L , Fujifilm X and Canon RF mounts.
Focal Range
Sigma 17-40mm f1.8 has a focal range of 17-40mm and
2.4X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
25.5-60mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 28-70mm F2.8 DG DN C has a focal range of 28-70mm and 2.5X zoom ratio .
