The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 15mm f1.4 DC C and the Sigma 12mm f1.4 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 12mm f1.4 is the longer of the two lenses at 67mm. The Sigma 15mm f1.4 DC C with a length of 63mm, is 4mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 69mm.
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 15mm f1.4 DC C weighs 240g, which means it is 10g (4%) lighter than the Sigma 12mm f1.4 which has a weight of 250g.
Filter Threads
The Sigma 15mm f1.4 DC C has a filter size of 58mm whereas the Sigma 12mm f1.4 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 58mm filters that we recommend you to consider for the Sigma 15mm f1.4 DC C:
And these are the 62mm filters that we recommend for the Sigma 12mm f1.4:
Lens Mounts
Both the Sigma 15mm f1.4 DC C and the Sigma 12mm f1.4 has the same Canon RF lens mount. Some of the latest released cameras that are compatible with the Canon RF lenses are Canon R50 V, Canon R100 and Canon R50.
Sigma 15mm f1.4 DC C is also available in the Fujifilm X and Sony E mounts.
Sigma 12mm f1.4 is also available in Sony E and Fujifilm X mounts.
Focal Range
Sigma 15mm f1.4 DC C is a prime lens with fixed focal lenght of 15mm which has an effective (full-frame 35mm equivalent) focal range of
24mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 12mm f1.4 is a prime lens with fixed focal lenght of 12mm which has an effective (full-frame 35mm equivalent) focal range of 18mm when used on a APS-C / DX format camera.
