The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Viltrox 9mm F2.8 X and the Canon RF 50mm F1.8 STM 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. Viltrox 9mm F2.8 X is the longer of the two lenses at 56mm. The Canon RF 50mm F1.8 STM with a length of 41mm, is 15mm shorter. On the other hand, the Canon RF 50mm F1.8 STM has a larger diameter of 69mm compared to the Viltrox 9mm F2.8 X's 65mm 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. Canon RF 50mm F1.8 STM weighs 160g, 8% (15g) lighter than the Viltrox 9mm F2.8 X's weight of 175g.
Filter Threads
The Viltrox 9mm F2.8 X has a filter size of 58mm whereas the Canon RF 50mm F1.8 STM has a 43mm 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 Viltrox 9mm F2.8 X:
And these are the 43mm filters that we recommend for the Canon RF 50mm F1.8 STM:
Lens Mounts
The Viltrox 9mm F2.8 X has the Fujiflm X lens mount whereas the Canon RF 50mm F1.8 STM has the Canon RF 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 Fujiflm X Mount and Canon R6 V, Canon R6 III and Canon C50 for the Canon RF Mount.
Focal Range
Viltrox 9mm F2.8 X is a prime lens with fixed focal lenght of 9mm which has an effective (full-frame 35mm equivalent) focal range of
13.5mm when used on a APS-C / DX format camera.
On the other hand, the Canon RF 50mm F1.8 STM is a prime lens with fixed focal lenght of 50mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 80mm.
