The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony E 16-55mm F2.8 G and the Sigma 18-50mm F2.8-4.5 DC OS 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. Sony E 16-55mm F2.8 G is the longer of the two lenses at 100mm. The Sigma 18-50mm F2.8-4.5 DC OS HSM with a length of 89mm, is 11mm shorter. On the other hand, the Sigma 18-50mm F2.8-4.5 DC OS HSM has a larger diameter of 74mm compared to the Sony E 16-55mm F2.8 G'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. Sigma 18-50mm F2.8-4.5 DC OS HSM weighs 395g, 20% (99g) lighter than the Sony E 16-55mm F2.8 G's weight of 494g.
Filter Threads
Both the Sony E 16-55mm F2.8 G and the Sigma 18-50mm F2.8-4.5 DC OS HSM 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 Sony E 16-55mm F2.8 G has the Sony E lens mount whereas the Sigma 18-50mm F2.8-4.5 DC OS HSM has the Sony Alpha lens mount. Some of the latest released cameras that are compatible with these mounts are Sony A6700, Sony FX30 and Sony ZV-E10 for the Sony E Mount and Sony A68, Sony A77 II and Sony A58 for the Sony Alpha Mount.
Sigma 18-50mm F2.8-4.5 DC OS HSM is also available in Canon EF , Pentax KAF3, Sigma SA and Nikon F (DX) mounts.
Focal Range
Sony E 16-55mm F2.8 G has a focal range of 16-55mm and
3.4X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
24-82.5mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 18-50mm F2.8-4.5 DC OS HSM has a focal range of 18-50mm and 2.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27-75mm when used on a APS-C / DX format camera.