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 Fujifilm 18-55mm F2.8-4 R LM OIS 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. Fujifilm 18-55mm F2.8-4 R LM OIS is the longer of the two lenses at 70mm. The SG-image 25mm F1.8 with a length of 32mm, is 38mm shorter. On the other hand, the SG-image 25mm F1.8 has a larger diameter of 67mm compared to the Fujifilm 18-55mm F2.8-4 R LM OIS'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 165g (53%) lighter than the Fujifilm 18-55mm F2.8-4 R LM OIS which has a weight of 310g.
Filter Threads
The SG-image 25mm F1.8 has a filter size of 52mm whereas the Fujifilm 18-55mm F2.8-4 R LM OIS has a 58mm 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 58mm filters that we recommend for the Fujifilm 18-55mm F2.8-4 R LM OIS:
Lens Mounts
Both the SG-image 25mm F1.8 and the Fujifilm 18-55mm F2.8-4 R LM OIS 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.
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 Fujifilm 18-55mm F2.8-4 R LM OIS has a focal range of 18-55mm and 3.1X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27-82.5mm when used on a APS-C / DX format camera.
