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 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 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's 71mm diameter.
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Below you can find a scaled side-by-side image of Sigma 70mm F2.8 DG Macro and Sony FE 90mm F2.8 Macro G OSS to get a better idea of how their sizes compare in real life.
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 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.
Below you can find the dimension and weight table of the Macro Prime Lenses in Sony E Mount for size comparison purposes.
Macro Lenses in Sony E Mount for Size Comparison
Filter Threads
The Sigma 70mm F2.8 DG Macro 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:
And these are the 62mm filters that we recommend for the Sony FE 90mm F2.8 Macro G OSS:
Lens Mounts
Both the Sigma 70mm F2.8 DG Macro and the Sony FE 90mm F2.8 Macro G OSS has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony A9 III, Sony A7C Mark II and Sony A7CR.
Sigma 70mm F2.8 DG Macro is also available in Canon EF , Nikon F (FX) and Sigma SA mounts.
Focal Range
Sigma 70mm F2.8 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.
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.