The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony E 35mm F1.8 OSS and the Sony E 20mm F2.8 for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is an important deciding factor when comparing two lenses. Sony E 35mm F1.8 OSS is the longer of the two lenses at 45mm. The Sony E 20mm F2.8 with a length of 20mm, is 25mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 63mm.
The weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Sony E 20mm F2.8 weighs 69g, 55% (86g) lighter than the Sony E 35mm F1.8 OSS's weight of 155g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Sony E Mount for size comparison purposes.
Wideangle Prime Lenses in Sony E Mount for Size Comparison
Lens Mounts
Both the Sony E 35mm F1.8 OSS and the Sony E 20mm F2.8 has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony FX30, Sony ZV-E10 and Sony A6600.
Focal Range
Sony E 35mm F1.8 OSS is a prime lens with fixed focal lenght of 35mm which has an effective (full-frame 35mm equivalent) focal range of 52.5mm when used on a APS-C / DX format camera. Sony E 20mm F2.8 is a prime lens with fixed focal lenght of 20mm which has an effective (full-frame 35mm equivalent) focal range of 30mm when used on a APS-C / DX format camera.