Tamron has announced the release of its new 12-20mm f/2.8 Di III-A lens, a constant-aperture ultrawide zoom designed for full-frame mirrorless cameras. The lens will be available in both Sony E-mount and Nikon Z-mount versions, expanding options for creators using these popular systems. Priced at $1,699, the lens positions itself as a premium offering for photographers and videographers who require consistent exposure across the zoom range.

The constant f/2.8 aperture ensures reliable low-light performance and depth-of-field control, making it suitable for landscape, architecture, and interior shooting. As an ultrawide zoom covering 12-20mm, it provides a broad perspective without the need for frequent lens changes, ideal for creators working in tight spaces or capturing expansive scenes.

For Sony users, the lens complements the company’s professional-grade cameras, which are renowned for advanced autofocus systems and high-resolution sensor technology. While the lens itself does not include autofocus motors—relying on the camera body for focus—it is engineered to fully leverage the speed and accuracy of Sony’s AF systems when mounted on compatible E-mount bodies.

This release reflects Tamron’s ongoing strategy to support major mirrorless ecosystems with high-quality, competitively priced optics. By offering a constant-aperture ultrawide zoom at this focal range, Tamron addresses a niche but growing demand among hybrid shooters who prioritize both image quality and workflow efficiency.

The lens is expected to appeal to content creators, architectural photographers, and videographers who value optical consistency and wide-angle versatility. Availability details beyond the announcement have not been disclosed in the source, but the launch signals continued innovation in the third-party lens market for Sony and Nikon users.