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 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 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'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 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 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 weighs 470g, 12% (65g) lighter than the Sigma 17-40mm f1.8's weight of 535g.
Below you can find the dimension and weight table of the Standard Zoom Lenses in Sony E Mount for size comparison purposes.
Standard Sony E Mount
Filter Threads
Both the Sigma 17-40mm f1.8 and the Sigma 28-70mm F2.8 DG DN 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
Both the Sigma 17-40mm f1.8 and the Sigma 28-70mm F2.8 DG DN has the same Sony E lens mount . Some of the latest released cameras that are compatible with the Sony E lenses are Sony ZV-E10 II , Sony A6700 and Sony FX30 .
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 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 .
