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 Zeiss Touit 50mm f2.8 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. Zeiss Touit 50mm f2.8 is the longer of the two lenses at 91mm. The SG-image 25mm F1.8 with a length of 32mm, is 59mm shorter. On the other hand, the SG-image 25mm F1.8 has a larger diameter of 67mm compared to the Zeiss Touit 50mm f2.8'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. SG-image 25mm F1.8 weighs 145g, which means it is 145g (50%) lighter than the Zeiss Touit 50mm f2.8 which has a weight of 290g.
Below you can find the dimension and weight table of the Standard Prime Lenses in Fujifilm X Mount for size comparison purposes.
Standard Lenses in Fujifilm X Mount for Size Comparison
Filter Threads
Both the SG-image 25mm F1.8 and the Zeiss Touit 50mm f2.8 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
Both the SG-image 25mm F1.8 and the Zeiss Touit 50mm f2.8 has the same Fujifilm X lens mount. Some of the latest released cameras that are compatible with the Fujifilm X lenses are Fujifilm X-T30 III, Fujifilm X-E5 and Fujifilm X-M5.
SG-image 25mm F1.8 is also available in the Sony E and Nikon Z mounts.
Zeiss Touit 50mm f2.8 is also available in Sony E mount.
Focal Range
SG-image 25mm F1.8 is a prime lens with fixed focal lenght of 25mm which has an effective (full-frame 35mm equivalent) focal range of
37.5mm when used on a APS-C / DX format camera.
On the other hand, the Zeiss Touit 50mm f2.8 is a prime lens with fixed focal lenght of 50mm which has an effective (full-frame 35mm equivalent) focal range of 75mm when used on a APS-C / DX format camera.
