The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Yongnuo 56mm F1.4S Z 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. Yongnuo 56mm F1.4S Z is the longer of the two lenses at 89mm. The Sony FE 85mm F1.8 with a length of 82mm, is 7mm shorter. On the other hand, the Sony FE 85mm F1.8 has a larger diameter of 78mm compared to the Yongnuo 56mm F1.4S Z's 69mm 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. Sony FE 85mm F1.8 weighs 371g, 1% (4g) lighter than the Yongnuo 56mm F1.4S Z's weight of 375g.
Filter Threads
The Yongnuo 56mm F1.4S Z has a filter size of 58mm 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 58mm filters that we recommend you to consider for the Yongnuo 56mm F1.4S Z:
And these are the 67mm filters that we recommend for the Sony FE 85mm F1.8:
Lens Mounts
The Yongnuo 56mm F1.4S Z has the Nikon Z lens mount whereas the Sony FE 85mm F1.8 has the Sony E lens mount. Some of the latest released cameras that are compatible with these mounts are RED Komodo-X 6K Z, Nikon Z50 II and Nikon Z30 for the Nikon Z Mount and Sony FX5, Sony A7R VI and Sony A7 V for the Sony E Mount.
Focal Range
Yongnuo 56mm F1.4S Z is a prime lens with fixed focal lenght of 56mm which has an effective (full-frame 35mm equivalent) focal range of
84mm 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.
