The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 45mm F2.8 DG DN C and the Carl Zeiss Touit 1.8/32 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. Carl Zeiss Touit 1.8/32 is the longer of the two lenses at 60mm. The Sigma 45mm F2.8 DG DN C with a length of 46mm, is 14mm shorter. Besides being longer, the Carl Zeiss Touit 1.8/32 also has a larger diameter of 65mm compared to the Sigma 45mm F2.8 DG DN C's 64mm 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. Carl Zeiss Touit 1.8/32 weighs 210g, 2% (5g) lighter than the Sigma 45mm F2.8 DG DN C's weight of 215g.
Below you can find the dimension and weight table of the Standard Prime Lenses in Sony E Mount for size comparison purposes.
Standard Lenses in Sony E Mount for Size Comparison
Filter Threads
The Sigma 45mm F2.8 DG DN C has a filter size of 55mm whereas the Carl Zeiss Touit 1.8/32 has a 52mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 55mm filters that we recommend you to consider for the Sigma 45mm F2.8 DG DN C:
And these are the 52mm filters that we recommend for the Carl Zeiss Touit 1.8/32:
Lens Mounts
Both the Sigma 45mm F2.8 DG DN C and the Carl Zeiss Touit 1.8/32 has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony FX5, Sony A7R VI and Sony A7 V.
Sigma 45mm F2.8 DG DN C is also available in the Leica L mount.
Carl Zeiss Touit 1.8/32 is also available in Fujifilm X mount.
Focal Range
Sigma 45mm F2.8 DG DN C is a prime lens with fixed focal lenght of 45mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
67.5mm.
On the other hand, the Carl Zeiss Touit 1.8/32 is a prime lens with fixed focal lenght of 32mm which has an effective (full-frame 35mm equivalent) focal range of 48mm when used on a APS-C / DX format camera.
