Saw this: https://www.sony-rumors.com/sigma-50mm-f-1-2-dg-dn-art-lens-first-leaked-photo-to-be-announced-soon/

1. Aperture: Wide maximum aperture of f/1.2, ideal for low light conditions and achieving shallow depth of field effects.
2. Aperture Blades: Comprises 13 blades, offering smoother and more attractive bokeh compared to lenses with fewer aperture blades.
3. Build and Design: Retains the compact and ergonomic design similar to the Sigma 50mm f/1.4, making it user-friendly and portable.
4. Filter Diameter: Features a 77mm filter diameter, larger than the 72mm typically found in similar lenses, allowing for greater light gathering and the use of common filters.
5. Mount Compatibility: Available for Sony E and Leica L mounts, ensuring compatibility with a broad range of mirrorless camera bodies.
6. Size and Weight: Lighter and more compact than the Sony 50mm f/1.2 GM, enhancing its appeal for photographers who value ease of carry and operation.
7. Price: More affordable than comparable lenses like the Sony 50mm f/1.2 GM, offering professional-grade performance at a more accessible price point.
8. Optical Performance: Expected to deliver the high-quality imagery characteristic of Sigma's Art series, with excellent sharpness, contrast, and color rendition.
9. Announcement Timeline: Rumored to be officially announced within two weeks from the leak, indicating its imminent availability in the market.