The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony FE 100mm F2.8 STF GM 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 Sony FE 100mm F2.8 STF GM with a length of 118mm, is 13mm shorter. On the other hand, the Sony FE 100mm F2.8 STF GM has a larger diameter of 85mm compared to the Sony FE 90mm F2.8 Macro G OSS's 79mm diameter.
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Below you can find a scaled side-by-side image of Sony FE 100mm F2.8 STF GM 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. Sony FE 90mm F2.8 Macro G OSS weighs 602g, 14% (98g) lighter than the Sony FE 100mm F2.8 STF GM's weight of 700g.
Filter Threads
The Sony FE 100mm F2.8 STF GM has a filter size of 72mm 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 72mm filters that we recommend you to consider for the Sony FE 100mm F2.8 STF GM:
And these are the 62mm filters that we recommend for the Sony FE 90mm F2.8 Macro G OSS:
Lens Mounts
Both the Sony FE 100mm F2.8 STF GM 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.
Focal Range
Sony FE 100mm F2.8 STF GM is a prime lens with fixed focal lenght of 100mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
150mm.
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.