Sigma Patent Discovered: Ultra-Fast 24mm f/1.2 and 28mm f/1.2 Lenses on the Horizon?
Sigma is no stranger to pushing the boundaries of optical design, especially when it comes to their acclaimed Art series for full-frame mirrorless cameras. A newly uncovered patent (JP2025-167449) reveals that Sigma is actively exploring some incredibly fast wide-angle prime lenses: a 24mm f/1.2 and a 28mm f/1.2.
For Sony E-mount shooters, this is highly exciting news. We already have the massive but optically stellar Sigma 35mm f/1.2 DG DN Art. Extending that ultra-fast f/1.2 aperture to wider focal lengths would be a dream for low-light event photography, environmental portraiture, and especially astrophotography, where gathering every possible photon is critical.
Looking at the optical formulas from the patent literature, both the 24mm and 28mm designs share a highly complex, glass-heavy structure typical of modern mirrorless lens design.
The 24mm f/1.2 would go head-to-head with lenses like Sony’s own 24mm f/1.4 GM, offering an extra half-stop of light-gathering capability, albeit almost certainly at the cost of a larger size and heavier weight.
The 28mm f/1.2 is a particularly interesting proposition. The 28mm focal length has seen a major resurgence in popularity for street and documentary photography, and an f/1.2 option would be highly unique in the current native E-mount lineup.
Would you prefer the wider 24mm or the classic 28mm field of view for a massive f/1.2 prime? Let us know in the comments below!
via j-platpat