The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Fujifilm 23mm F2.8 and the Viltrox 28mm F4.5 Z 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. Fujifilm 23mm F2.8 is the longer of the two lenses at 23mm. The Viltrox 28mm F4.5 Z with a length of 22mm, is 1mm shorter. On the other hand, the Viltrox 28mm F4.5 Z has a larger diameter of 65mm compared to the Fujifilm 23mm F2.8's 62mm 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. Viltrox 28mm F4.5 Z weighs 88g, 2% (2g) lighter than the Fujifilm 23mm F2.8's weight of 90g.
Lens Mounts
The Fujifilm 23mm F2.8 has the Fujifilm X lens mount whereas the Viltrox 28mm F4.5 Z has the Nikon Z lens mount. Some of the latest released cameras that are compatible with these mounts are Fujifilm X-T30 III, Fujifilm X-E5 and Fujifilm X-M5 for the Fujifilm X Mount and Nikon ZR, Nikon Z5 II and RED Komodo-X 6K Z for the Nikon Z Mount.
Focal Range
Fujifilm 23mm F2.8 is a prime lens with fixed focal lenght of 23mm which has an effective (full-frame 35mm equivalent) focal range of
34.5mm when used on a APS-C / DX format camera.
On the other hand, the Viltrox 28mm F4.5 Z is a prime lens with fixed focal lenght of 28mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 42mm.