The type of photography that you are planning to use is an important decision factor. Here we have evaluated the PENTAX28-105mm F3.5-5.6 WR and the Sony DT 16-80mm F3.5-4.5 ZA 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. PENTAX28-105mm F3.5-5.6 WR is the longer of the two lenses at 87mm. The Sony DT 16-80mm F3.5-4.5 ZA with a length of 83mm, is 4mm shorter. Besides being longer, the PENTAX28-105mm F3.5-5.6 WR also has a larger diameter of 73mm compared to the Sony DT 16-80mm F3.5-4.5 ZA's 72mm 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. PENTAX28-105mm F3.5-5.6 WR weighs 440g, which means it is 5g (1%) lighter than the Sony DT 16-80mm F3.5-4.5 ZA which has a weight of 445g.
Filter Threads
Both the PENTAX28-105mm F3.5-5.6 WR and the Sony DT 16-80mm F3.5-4.5 ZA have the same Filter thread size of 62mm.
Below are links to the 62mm filters that we recommend you to consider for these lenses:
Lens Mounts
The PENTAX28-105mm F3.5-5.6 WR has the Pentax KAF3 lens mount whereas the Sony DT 16-80mm F3.5-4.5 ZA has the Sony Alpha lens mount. Some of the latest released cameras that are compatible with these mounts are Pentax K-3 III Mono, Pentax KF and Pentax K-3 III for the Pentax KAF3 Mount and Sony A68, Sony A77 II and Sony A58 for the Sony Alpha Mount.
Focal Range
PENTAX28-105mm F3.5-5.6 WR has a focal range of 28-105mm and
3.8X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
42 - 157.5mm.
On the other hand, the Sony DT 16-80mm F3.5-4.5 ZA has a focal range of 16-80mm and 5.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 24-120mm when used on a APS-C / DX format camera.
