The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 28-105mm f2.8 and the Sigma 70mm F2.8 DG Macro A 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 28-105mm f2.8 is the longer of the two lenses at 158mm. The Sigma 70mm F2.8 DG Macro A with a length of 106mm, is 52mm shorter. Besides being longer, the Sigma 28-105mm f2.8 also has a larger diameter of 88mm compared to the Sigma 70mm F2.8 DG Macro A's 71mm diameter.
Below you can find a scaled side-by-side image of Sigma 28-105mm f2.8 and Sigma 70mm F2.8 DG Macro A to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 28-105mm f2.8 and the Sigma 70mm F2.8 DG Macro A 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 70mm F2.8 DG Macro A weighs 515g, 48% (480g) lighter than the Sigma 28-105mm f2.8's weight of 995g.
Filter Threads
The Sigma 28-105mm f2.8 has a filter size of 82mm whereas the Sigma 70mm F2.8 DG Macro A has a 49mm 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 28-105mm f2.8:
And these are the 49mm filters that we recommend for the Sigma 70mm F2.8 DG Macro A:
Lens Mounts
The Sigma 28-105mm f2.8 has the Sony E lens mount whereas the Sigma 70mm F2.8 DG Macro A has the Leica L lens mount . Some of the latest released cameras that are compatible with these mounts are Sony FX5 , Sony A7R VI and Sony A7 V for the Sony E Mount and Leica SL3-P , Panasonic S1 II and Panasonic S1 IIE for the Leica L Mount.
Focal Range
Sigma 28-105mm f2.8 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 Sigma 70mm F2.8 DG Macro A is a prime lens with fixed focal lenght of 70mm.
