Tokina ultra-wide 21mm in Canon FD mount, affordable dramatic wide-angle perspectives for the FD system.
This listing appears to be a Tokina-manufactured 21mm f/3.8 ultra-wide-angle lens in Canon FD mount, sold under the Tokina SuperWide branding. The 21mm perspective provides a dramatic ultra-wide field of view, and Tokina was one of the most respected third-party lens manufacturers producing FD-mount alternatives.
The 21mm focal length provides a 92-degree angle of view on full-frame, creating dramatic wide-angle perspectives for landscapes, architecture, and interior photography. The f/3.8 aperture is typical for ultra-wide lenses of this era, and Tokina's optical designs were generally well-regarded for quality at their price point.
Build quality is standard Tokina with all-metal construction and adequate mechanical feel. The Canon FD mount provides direct compatibility with all Canon FD system cameras. The compact barrel maintains the portability despite the complex ultra-wide optical design.
This Tokina ultra-wide offers affordable 21mm capability for Canon FD shooters on the used market. The dramatic ultra-wide perspective is impossible to achieve with standard or wide-angle zoom lenses, making it a useful addition for photographers who need maximum coverage.