The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 28-45mm F1.8 and the Sigma 28mm F1.4 DG HSM A 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 28-45mm F1.8 is the longer of the two lenses at 151mm. The Sigma 28mm F1.4 DG HSM A with a length of 108mm, is 43mm shorter. Besides being longer, the Sigma 28-45mm F1.8 also has a larger diameter of 88mm compared to the Sigma 28mm F1.4 DG HSM A's 83mm 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 28mm F1.4 DG HSM A weighs 925g, 3% (35g) lighter than the Sigma 28-45mm F1.8's weight of 960g.
Filter Threads
The Sigma 28-45mm F1.8 has a filter size of 82mm whereas the Sigma 28mm F1.4 DG HSM A 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 82mm filters that we recommend you to consider for the Sigma 28-45mm F1.8:
And these are the 77mm filters that we recommend for the Sigma 28mm F1.4 DG HSM A:
Lens Mounts
The Sigma 28-45mm F1.8 has the Leica L lens mount whereas the Sigma 28mm F1.4 DG HSM A has the Sony E lens mount. Some of the latest released cameras that are compatible with these mounts are Leica SL3-P, Panasonic S1 II and Panasonic S1 IIE for the Leica L Mount and Sony FX5, Sony A7R VI and Sony A7 V for the Sony E Mount.
Sigma 28-45mm F1.8 is also available in the Sony E mount.
Sigma 28mm F1.4 DG HSM A is also available in Canon EF , Nikon F (FX), Sigma SA and Leica L mounts.
Focal Range
Sigma 28-45mm F1.8 has a focal range of 28-45mm and
1.6X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
42 - 67.5mm.
On the other hand, the Sigma 28mm F1.4 DG HSM A 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.
