Brand: Sigma Focal Length Description: Single Focal Length 16mm Lens Type: 13 groups, 16 elements Compatible Mount: Sony E Camera Lens Description: Single Focal Length Lens Maximum Focal Length: 16 millimeters Included Accessories: Lens cap Reference Price: ¥69,800 Purchase Date: Purchased in 2021 (used for about six months) This lens boasts a luxurious 13-group, 16-element construction, incorporating three FLD glass elements, two SLD glass elements, and two glass-molded aspherical lenses. This design suppresses various aberrations and achieves high resolution from the maximum aperture. In particular, the two glass-molded aspherical lenses are processed with nano-order precision on the lens surface, suppressing the swirling ring-shaped bokeh that tends to occur with aspherical lenses, and providing clear depiction across the entire screen. The optical design and the adoption of a stepping motor, which support video AF, enable natural focus work with autofocus. While prioritizing image quality, both miniaturization and comfortable operability have been achieved. Compactness has been achieved by considering the balance when used with a small and lightweight camera body that adopts a short flange back. By achieving a brightness of F1.4 and high optical performance, and employing digital correction for distortion aberration, cutting-edge technology has been incorporated. Thank you for viewing.