The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony FE 40mm F2.5 G and the Sony FE 50mm F2.8 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 FE 50mm F2.8 Macro is the longer of the two lenses at 71mm. The Sony FE 40mm F2.5 G with a length of 45mm, is 26mm shorter. Besides being longer, the Sony FE 50mm F2.8 Macro also has a larger diameter of 71mm compared to the Sony FE 40mm F2.5 G's 68mm diameter.
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Below you can find a scaled side-by-side image of Sony FE 40mm F2.5 G and Sony FE 50mm F2.8 Macro 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 40mm F2.5 G weighs 173g, which means it is 63g (26%) lighter than the Sony FE 50mm F2.8 Macro which has a weight of 236g.
Filter Threads
The Sony FE 40mm F2.5 G has a filter size of 49mm whereas the Sony FE 50mm F2.8 Macro has a 55mm 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 Sony FE 40mm F2.5 G:
And these are the 55mm filters that we recommend for the Sony FE 50mm F2.8 Macro:
Lens Mounts
Both the Sony FE 40mm F2.5 G and the Sony FE 50mm F2.8 Macro 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 40mm F2.5 G is a prime lens with fixed focal lenght of 40mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
60mm.
On the other hand, the Sony FE 50mm F2.8 Macro is a prime lens with fixed focal lenght of 50mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 75mm.