The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony DT 16-50mm F2.8 SSM and the Pentax D FA 24-70mm F2.8 ED SDM WR 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. Pentax D FA 24-70mm F2.8 ED SDM WR is the longer of the two lenses at 110mm. The Sony DT 16-50mm F2.8 SSM with a length of 88mm, is 22mm shorter. Besides being longer, the Pentax D FA 24-70mm F2.8 ED SDM WR also has a larger diameter of 89mm compared to the Sony DT 16-50mm F2.8 SSM's 81mm 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. Sony DT 16-50mm F2.8 SSM weighs 577g, which means it is 210g (26%) lighter than the Pentax D FA 24-70mm F2.8 ED SDM WR which has a weight of 787g.
Lens Mounts
The Sony DT 16-50mm F2.8 SSM has the Sony Alpha lens mount whereas the Pentax D FA 24-70mm F2.8 ED SDM WR has the Pentax KAF3 lens mount. Some of the latest released cameras that are compatible with these mounts are Sony A68, Sony A77 II and Sony A58 for the Sony Alpha Mount and Pentax K-3 III Mono, Pentax KF and Pentax K-3 III for the Pentax KAF3 Mount.
Focal Range
Sony DT 16-50mm F2.8 SSM has a focal range of 16-50mm and
3.1X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
24-75mm when used on a APS-C / DX format camera.
On the other hand, the Pentax D FA 24-70mm F2.8 ED SDM WR 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.
