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 Nikon Z 40mm F2 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. Nikon Z 40mm F2 is the longer of the two lenses at 46mm. The SG-image 25mm F1.8 with a length of 32mm, is 14mm shorter. Besides being longer, the Nikon Z 40mm F2 also has a larger diameter of 70mm 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, which means it is 25g (14%) lighter than the Nikon Z 40mm F2 which has a weight of 170g.
Below you can find the dimension and weight table of the Standard Prime Lenses in Nikon Z Mount for size comparison purposes.
Standard Lenses in Nikon Z Mount for Size Comparison
Filter Threads
Both the SG-image 25mm F1.8 and the Nikon Z 40mm F2 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 Nikon Z 40mm F2 has the same Nikon Z lens mount. Some of the latest released cameras that are compatible with the Nikon Z lenses are RED Komodo-X 6K Z, Nikon Z50 II and Nikon Z30.
SG-image 25mm F1.8 is also available in the Sony E and Fujifilm X 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 Nikon Z 40mm F2 is a prime lens with fixed focal lenght of 40mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 60mm.
