The type of photography that you are planning to use is an important decision factor. Here we have evaluated the TTArtisan 17mm F4 TS and the SG-image 25mm F1.8 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. TTArtisan 17mm F4 TS is the longer of the two lenses at 114mm. The SG-image 25mm F1.8 with a length of 32mm, is 82mm shorter. Besides being longer, the TTArtisan 17mm F4 TS also has a larger diameter of 88mm compared to the SG-image 25mm F1.8's 67mm 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, 86% (906g) lighter than the TTArtisan 17mm F4 TS's weight of 1051g.
Lens Mounts
The TTArtisan 17mm F4 TS has the Leica L lens mount whereas the SG-image 25mm F1.8 has the Fujifilm X lens mount. Some of the latest released cameras that are compatible with these mounts are , and for the Leica L Mount and Fujifilm X-T30 III, Fujifilm X-E5 and Fujifilm X-M5 for the Fujifilm X Mount.
TTArtisan 17mm F4 TS is also available in the Sony E , Fujifilm G, Nikon Z and Canon RF mounts.
SG-image 25mm F1.8 is also available in Sony E and Nikon Z mounts.
Focal Range
TTArtisan 17mm F4 TS is a prime lens with fixed focal lenght of 17mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
25.5mm.
On the other hand, the 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.
