While maintaining a compact and lightweight design, the Laowa 9mm f/2.8 Zero-d Prime Lens for Canon Ef-m offers an impressive 113-degree angle of view, making it the world's widest rectilinear f/2.8 lens for mirrorless Aps-c cameras. This ultra-wide and ultra-fast prime lens, manufactured by Venus Optics, is a testament to their commitment to producing unique and high-quality Laowa camera lenses. The Laowa 9mm f/2.8 Zero-d is the latest addition to the Laowa 'Zero-d' line-up, known for their exceptional control of optical distortion, a common issue in ultra-wide-angle lenses. This lens boasts a 35mm equivalent focal length of approximately 13mm, offering photographers and videographers an expansive field of view for capturing stunning landscapes, low-light scenes, and astro-photography shots with ease.Despite its extreme specifications, Venus Optics has managed to keep the lens weight under 0.5 pounds (215g) and its length to a mere 2 inches (53mm). This makes it an ideal choice for videographers seeking a compact lens for gimbal or handheld shooting, reducing camera shake and enhancing video quality.The lens is composed of 15 elements in 10 groups, including 2 aspherical elements and 3 Extra-low dispersion elements. This advanced optical design minimizes distortion and chromatic aberrations, ensuring superb optical performance from corner to corner.The lens also features a fast f/2.8 aperture, enabling photographers to capture sharp, clear images even in low-light conditions. Additionally, the lens is designed with a 49mm filter thread, providing added convenience for those who wish to use screw-in filters. In summary, the Laowa 9mm f/2.8 Zero-d Prime Lens for Canon Ef-m is a versatile, high-performance lens that offers a unique combination of ultra-wide-angle views, fast aperture, and minimal distortion, all in a compact and lightweight design..