The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 70mm F2.8 DG Macro A and the Sony FE 90mm F2.8 Macro G OSS 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 FE 90mm F2.8 Macro G OSS is the longer of the two lenses at 131mm. The Sigma 70mm F2.8 DG Macro A with a length of 106mm, is 25mm shorter. Besides being longer, the Sony FE 90mm F2.8 Macro G OSS also has a larger diameter of 79mm 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 70mm F2.8 DG Macro A and Sony FE 90mm F2.8 Macro G OSS to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 70mm F2.8 DG Macro A and the Sony FE 90mm F2.8 Macro G OSS 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, which means it is 87g (14%) lighter than the Sony FE 90mm F2.8 Macro G OSS which has a weight of 602g.
Filter Threads
The Sigma 70mm F2.8 DG Macro A has a filter size of 49mm whereas the Sony FE 90mm F2.8 Macro G OSS has a 62mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 49mm filters that we recommend you to consider for the Sigma 70mm F2.8 DG Macro A:
And these are the 62mm filters that we recommend for the Sony FE 90mm F2.8 Macro G OSS:
Lens Mounts
The Sigma 70mm F2.8 DG Macro A has the Leica L lens mount whereas the Sony FE 90mm F2.8 Macro G OSS has the Sony E lens mount . Some of the latest released cameras that are compatible with these mounts are Leica SL3-P , Panasonic S1 II and Panasonic S1 IIE for the Leica L Mount and Sony FX5 , Sony A7R VI and Sony A7 V for the Sony E Mount.
Focal Range
Sigma 70mm F2.8 DG Macro A is a prime lens with fixed focal lenght of 70mm.
On the other hand, the Sony FE 90mm F2.8 Macro G OSS is a prime lens with fixed focal lenght of 90mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 135mm .
