The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Nikon 35mm f1.8G and the Sigma 30mm F1.4 DC HSM 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. Sigma 30mm F1.4 DC HSM is the longer of the two lenses at 63mm. The Nikon 35mm f1.8G with a length of 53mm, is 10mm shorter. Besides being longer, the Sigma 30mm F1.4 DC HSM also has a larger diameter of 74mm compared to the Nikon 35mm f1.8G's 70mm 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. Nikon 35mm f1.8G weighs 200g, which means it is 235g (54%) lighter than the Sigma 30mm F1.4 DC HSM which has a weight of 435g.
Below you can find the dimension and weight table of the Standard Prime Lenses in Nikon F (DX) Mount for size comparison purposes.
Standard Lenses in Nikon F (DX) Mount for Size Comparison
Filter Threads
The Nikon 35mm f1.8G has a filter size of 52mm whereas the Sigma 30mm F1.4 DC HSM has a 62mm 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 Nikon 35mm f1.8G:
And these are the 62mm filters that we recommend for the Sigma 30mm F1.4 DC HSM:
Lens Mounts
Both the Nikon 35mm f1.8G and the Sigma 30mm F1.4 DC HSM has the same Nikon F (DX) lens mount. Some of the latest released cameras that are compatible with the Nikon F (DX) lenses are Nikon D3500, Nikon D7500 and Nikon D5600.
Nikon 35mm f1.8G is also available in Nikon F (FX) mount.
Sigma 30mm F1.4 DC HSM is also available in Canon EF and Sigma SA mounts.
Focal Range
Nikon 35mm f1.8G is a prime lens with fixed focal lenght of 35mm which has an effective (full-frame 35mm equivalent) focal range of
52.5mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 30mm F1.4 DC HSM is a prime lens with fixed focal lenght of 30mm which has an effective (full-frame 35mm equivalent) focal range of 45mm when used on a APS-C / DX format camera.