The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 30mm F1.4 EX DC HSM and the Sigma 24mm F1.8 EX DG 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 24mm F1.8 EX DG is the longer of the two lenses at 83mm. The Sigma 30mm F1.4 EX DC HSM with a length of 59mm, is 24mm shorter. Besides being longer, the Sigma 24mm F1.8 EX DG also has a larger diameter of 84mm compared to the Sigma 30mm F1.4 EX DC HSM's 77mm 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. Sigma 30mm F1.4 EX DC HSM weighs 430g, which means it is 70g (14%) lighter than the Sigma 24mm F1.8 EX DG which has a weight of 500g.
Filter Threads
The Sigma 30mm F1.4 EX DC HSM has a filter size of 62mm whereas the Sigma 24mm F1.8 EX DG has a 77mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 62mm filters that we recommend you to consider for the Sigma 30mm F1.4 EX DC HSM:
And these are the 77mm filters that we recommend for the Sigma 24mm F1.8 EX DG:
Lens Mounts
Both the Sigma 30mm F1.4 EX DC HSM and the Sigma 24mm F1.8 EX DG has the same Sony Alpha lens mount. Some of the latest released cameras that are compatible with the Sony Alpha lenses are Sony A68, Sony A77 II and Sony A58.
Sigma 30mm F1.4 EX DC HSM is also available in the Canon EF-S , Nikon F (DX), Four Thirds, Pentax KAF and Sigma SA mounts.
Sigma 24mm F1.8 EX DG is also available in Canon EF , Nikon F (FX), Four Thirds, Pentax KAF, Sony Alpha, Sigma SA, Canon EF, Pentax KAF, Sigma SA and Nikon F (FX) mounts.
Focal Range
Sigma 30mm F1.4 EX 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.
On the other hand, the Sigma 24mm F1.8 EX DG is a prime lens with fixed focal lenght of 28mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 42mm.
