The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 30mm F1.4 C and the Carl Zeiss Biogon T2,8/25 ZM 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 C is the longer of the two lenses at 73mm. The Carl Zeiss Biogon T2,8/25 ZM with a length of 71mm, is 2mm shorter. Besides being longer, the Sigma 30mm F1.4 C also has a larger diameter of 65mm compared to the Carl Zeiss Biogon T2,8/25 ZM's 53mm 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 Biogon T2,8/25 ZM weighs 260g, 1% (5g) lighter than the Sigma 30mm F1.4 C's weight of 265g.
Filter Threads
The Sigma 30mm F1.4 C has a filter size of 52mm whereas the Carl Zeiss Biogon T2,8/25 ZM has a 46mm 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 Sigma 30mm F1.4 C:
And these are the 46mm filters that we recommend for the Carl Zeiss Biogon T2,8/25 ZM:
Lens Mounts
The Sigma 30mm F1.4 C has the Sony E lens mount whereas the Carl Zeiss Biogon T2,8/25 ZM has the Leica M lens mount. Some of the latest released cameras that are compatible with these mounts are Sony ZV-E10 II, Sony A6700 and Sony FX30 for the Sony E Mount and Leica M EV1, Leica M11-D and Pixii Max for the Leica M Mount.
Sigma 30mm F1.4 C is also available in the Micro Four Thirds , Fujifilm X, Nikon Z, Leica L and Canon RF mounts.
Focal Range
Sigma 30mm F1.4 C 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 Carl Zeiss Biogon T2,8/25 ZM is a prime lens with fixed focal lenght of 25mm.
