The type of photography that you are planning to use is an important decision factor. Here we have evaluated the 7artisans 25mm F1.8 and the Sony FE 20mm F1.8 G 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 20mm F1.8 G is the longer of the two lenses at 85mm. The 7artisans 25mm F1.8 with a length of 32mm, is 53mm shorter. Besides being longer, the Sony FE 20mm F1.8 G also has a larger diameter of 74mm compared to the 7artisans 25mm F1.8's 51mm diameter.
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Below you can find a scaled side-by-side image of 7artisans 25mm F1.8 and Sony FE 20mm F1.8 G 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. 7artisans 25mm F1.8 weighs 143g, which means it is 230g (61%) lighter than the Sony FE 20mm F1.8 G which has a weight of 373g.
Filter Threads
The 7artisans 25mm F1.8 has a filter size of 46mm whereas the Sony FE 20mm F1.8 G has a 67mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 46mm filters that we recommend you to consider for the 7artisans 25mm F1.8:
And these are the 67mm filters that we recommend for the Sony FE 20mm F1.8 G:
Lens Mounts
Both the 7artisans 25mm F1.8 and the Sony FE 20mm F1.8 G has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony A6700, Sony FX30 and Sony ZV-E10.
7artisans 25mm F1.8 is also available in Canon EF-M , Fujifilm X and Micro Four Thirds mounts.
Focal Range
7artisans 25mm F1.8 is a prime lens with fixed focal lenght of 25mm which has an effective (full-frame 35mm equivalent) focal range of
37.5mm when used on a APS-C / DX format camera.
On the other hand, the Sony FE 20mm F1.8 G is a prime lens with fixed focal lenght of 20mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 30mm.