The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Viltrox 75mm f1.8 X and the Sony FE 135mm F1.8 GM 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 135mm F1.8 GM is the longer of the two lenses at 127mm. The Viltrox 75mm f1.8 X with a length of 76mm, is 51mm shorter. Besides being longer, the Sony FE 135mm F1.8 GM also has a larger diameter of 90mm compared to the Viltrox 75mm f1.8 X's 69mm diameter.
Below you can find a scaled side-by-side image of Viltrox 75mm f1.8 X and Sony FE 135mm F1.8 GM to get a better idea of how their sizes compare in real life.
Comparison image of the Viltrox 75mm f1.8 X and the Sony FE 135mm F1.8 GM Size and Weight 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 75mm f1.8 X weighs 335g, which means it is 615g (64%) lighter than the Sony FE 135mm F1.8 GM which has a weight of 950g.
Filter Threads
The Viltrox 75mm f1.8 X has a filter size of 58mm whereas the Sony FE 135mm F1.8 GM has a 82mm 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 75mm f1.8 X:
And these are the 82mm filters that we recommend for the Sony FE 135mm F1.8 GM:
Lens Mounts
The Viltrox 75mm f1.8 X has the Fujifilm X lens mount whereas the Sony FE 135mm F1.8 GM 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 Fujifilm X Mount and Sony FX5 , Sony A7R VI and Sony A7 V for the Sony E Mount.
Focal Range
Viltrox 75mm f1.8 X is a prime lens with fixed focal lenght of 75mm which has an effective (full-frame 35mm equivalent) focal range of
112.5mm when used on a APS-C / DX format camera.
On the other hand, the Sony FE 135mm F1.8 GM is a prime lens with fixed focal lenght of 135mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 202.5mm .
