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 TTArtisan 27mm 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. TTArtisan 27mm F2.8 is the longer of the two lenses at 41mm. The SG-image 25mm F1.8 with a length of 32mm, is 9mm shorter. On the other hand, the SG-image 25mm F1.8 has a larger diameter of 67mm compared to the TTArtisan 27mm F2.8'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. TTArtisan 27mm F2.8 weighs 94g, 35% (51g) lighter than the SG-image 25mm F1.8's weight of 145g.
Filter Threads
The SG-image 25mm F1.8 has a filter size of 52mm whereas the TTArtisan 27mm F2.8 has a 39mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 52mm filters that we recommend you to consider for the SG-image 25mm F1.8:
And these are the 39mm filters that we recommend for the TTArtisan 27mm F2.8:
Lens Mounts
The SG-image 25mm F1.8 has the Fujifilm X lens mount whereas the TTArtisan 27mm F2.8 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 ZV-E10 II, Sony A6700 and Sony FX30 for the Sony E Mount.
SG-image 25mm F1.8 is also available in the Sony E and Nikon Z mounts.
TTArtisan 27mm F2.8 is also available in Fujifilm X and Nikon Z mounts.
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 TTArtisan 27mm F2.8 is a prime lens with fixed focal lenght of 27mm which has an effective (full-frame 35mm equivalent) focal range of 40.5mm when used on a APS-C / DX format camera.
