The Canon EF 20mm f/2.8 USM is a compact and lightweight ultra wide-angle prime lens, perfect for capturing expansive landscapes, dramatic architecture, and immersive interiors. Designed for Canon's full-frame and APS-C DSLR cameras, this lens delivers a wide 94° diagonal angle of view on full-frame bodies, and approximately 32mm equivalent on APS-C sensors, making it versatile for a range of photographic styles. Featuring a fast f/2.8 maximum aperture, the EF 20mm allows for excellent low-light performance and creative depth-of-field control. The lens construction includes 11 elements in 9 groups, incorporating a floating rear focusing system that maintains sharpness throughout the focus range. A ring-type Ultrasonic Motor (USM) ensures fast, smooth, and silent autofocus, with full-time manual focus override for precise control. Other notable features include a close focusing distance of just 0.25 meters (0.8 feet), a 72mm filter thread, and a durable build that balances performance and portability. Whether you're a landscape enthusiast or a street photographer looking for a discreet and high-quality wide-angle option, the Canon EF 20mm f/2.8 USM delivers reliable results in a compact form factor.