The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony E PZ 18-105mm F4 G and the Sigma 70mm F2.8 EX DG Macro 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 PZ 18-105mm F4 G is the longer of the two lenses at 110mm. The Sigma 70mm F2.8 EX DG Macro with a length of 95mm, is 15mm shorter. Besides being longer, the Sony E PZ 18-105mm F4 G also has a larger diameter of 78mm compared to the Sigma 70mm F2.8 EX DG Macro's 76mm 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 E PZ 18-105mm F4 G weighs 482g, which means it is 45g (8%) lighter than the Sigma 70mm F2.8 EX DG Macro which has a weight of 527g.
Lens Mounts
The Sony E PZ 18-105mm F4 G has the Sony E lens mount whereas the Sigma 70mm F2.8 EX DG Macro has the Sony Alpha lens mount. Some of the latest released cameras that are compatible with these mounts are Sony ZV-E10 II, Sony A6700 and Sony FX30 for the Sony E Mount and Sony A99 II, Sony A68 and Sony A77 II for the Sony Alpha Mount.
Sigma 70mm F2.8 EX DG Macro is also available in Canon EF , Nikon F (FX), Pentax KAF and Sigma SA mounts.
Focal Range
Sony E PZ 18-105mm F4 G has a focal range of 18-105mm and
5.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
27-157.5mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 70mm F2.8 EX DG Macro is a prime lens with fixed focal lenght of 70mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 105mm.
