The type of photography that you are planning to use is an important decision factor. Here we have evaluated the SG-image 25mm F1.8 and the Viltrox 25mm F1.7 X 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 25mm F1.7 X is the longer of the two lenses at 56mm. The SG-image 25mm F1.8 with a length of 32mm, is 24mm shorter. On the other hand, the SG-image 25mm F1.8 has a larger diameter of 67mm compared to the Viltrox 25mm F1.7 X's 64mm 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. SG-image 25mm F1.8 weighs 145g, which means it is 35g (19%) lighter than the Viltrox 25mm F1.7 X which has a weight of 180g.
Filter Threads
Both the SG-image 25mm F1.8 and the Viltrox 25mm F1.7 X have the same Filter thread size of 52mm.
Below are links to the 52mm filters that we recommend you to consider for these lenses:
Lens Mounts
The SG-image 25mm F1.8 has the Nikon Z lens mount whereas the Viltrox 25mm F1.7 X has the Fujifilm X 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 Fujifilm X-T30 III, Fujifilm X-E5 and Fujifilm X-M5 for the Fujifilm X Mount.
SG-image 25mm F1.8 is also available in the Sony E and Fujifilm X mounts.
Focal Range
Both lenses have the same focal range of
25mm but while SG-image 25mm F1.8 has the fastest aperture of
F1.8, the Viltrox 25mm F1.7 X's widest aperture value is
F1.7.
