The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 24-35mm F2 DG HSM A and the Sigma 18-35mm F1.8 DC HSM 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 24-35mm F2 DG HSM A is the longer of the two lenses at 123mm. The Sigma 18-35mm F1.8 DC HSM with a length of 121mm, is 2mm shorter. Besides being longer, the Sigma 24-35mm F2 DG HSM A also has a larger diameter of 88mm compared to the Sigma 18-35mm F1.8 DC HSM's 78mm diameter.
Below you can find a scaled side-by-side image of Sigma 24-35mm F2 DG HSM A and Sigma 18-35mm F1.8 DC HSM to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 24-35mm F2 DG HSM A and the Sigma 18-35mm F1.8 DC HSM 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 18-35mm F1.8 DC HSM weighs 810g, 13% (131g) lighter than the Sigma 24-35mm F2 DG HSM A's weight of 941g.
Filter Threads
The Sigma 24-35mm F2 DG HSM A has a filter size of 82mm whereas the Sigma 18-35mm F1.8 DC HSM 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 24-35mm F2 DG HSM A:
And these are the 72mm filters that we recommend for the Sigma 18-35mm F1.8 DC HSM:
Lens Mounts
Both the Sigma 24-35mm F2 DG HSM A and the Sigma 18-35mm F1.8 DC HSM has the same Sigma SA lens mount . Some of the latest released cameras that are compatible with the Sigma SA lenses are Sigma Quattro , Sigma Quattro H and Sigma SD1 Merrill .
Canon EF and Nikon F (FX) mounts.
Canon EF , Pentax KAF , Sony Alpha and Nikon F (DX) mounts.
Focal Range
Sigma 24-35mm F2 DG HSM A has a focal range of 24-35mm and
1.5X zoom ratio .
On the other hand, the Sigma 18-35mm F1.8 DC HSM has a focal range of 18-35mm and 1.9X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27-52.5mm when used on a APS-C / DX format camera.
