The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Yongnuo 50mm F1.8S II and the Sony FE 85mm F1.8 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 85mm F1.8 is the longer of the two lenses at 82mm. The Yongnuo 50mm F1.8S II with a length of 58mm, is 24mm shorter. Besides being longer, the Sony FE 85mm F1.8 also has a larger diameter of 78mm compared to the Yongnuo 50mm F1.8S II's 64mm diameter.
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. Yongnuo 50mm F1.8S II weighs 134g, which means it is 237g (63%) lighter than the Sony FE 85mm F1.8 which has a weight of 371g.
Filter Threads
The Yongnuo 50mm F1.8S II has a filter size of 49mm whereas the Sony FE 85mm F1.8 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 49mm filters that we recommend you to consider for the Yongnuo 50mm F1.8S II:
And these are the 67mm filters that we recommend for the Sony FE 85mm F1.8:
Lens Mounts
Both the Yongnuo 50mm F1.8S II and the Sony FE 85mm F1.8 has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony ZV-E10 II, Sony A6700 and Sony FX30.
Focal Range
Yongnuo 50mm F1.8S II is a prime lens with fixed focal lenght of 50mm which has an effective (full-frame 35mm equivalent) focal range of
75mm when used on a APS-C / DX format camera.
On the other hand, the Sony FE 85mm F1.8 is a prime lens with fixed focal lenght of 85mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 127.5mm.
