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 Sony E 30mm F3.5 Macro for their suitability to various photography scenarios:
Size and Weight Comparison
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 E 30mm F3.5 Macro weighs 138g, 21% (37g) 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 Sony E 30mm F3.5 Macro has a 49mm 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 49mm filters that we recommend for the Sony E 30mm F3.5 Macro:
Lens Mounts
The Viltrox 9mm F2.8 X has the Fujiflm X lens mount whereas the Sony E 30mm F3.5 Macro has the Sony E 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 Sony ZV-E10 II, Sony A6700 and Sony FX30 for the Sony E 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 Sony E 30mm F3.5 Macro is a prime lens with fixed focal lenght of 30mm which has an effective (full-frame 35mm equivalent) focal range of 45mm when used on a APS-C / DX format camera.
