Quick Overview Constant f/2.8 aperture across the zoom range. Wide focal length range from 28-105mm. High-response linear actuator motor for quick and accurate autofocus. Advanced optical construction with FLD, SLD, and aspherical elements. Weather-sealed design for durability in diverse shooting conditions. Manual aperture ring with adjustable settings for video and photo applications. Product Description The Sigma 28-105mm f/2.8 DG DN Art Lens for L-Mount is a versatile and high-performance zoom lens, catering to both photography enthusiasts and professionals. Its constant f/2.8 aperture ensures consistent brightness across the zoom range, making it an ideal choice for varied applications, including landscapes, portraits, and events. Designed specifically for full-frame mirrorless systems, this lens incorporates advanced optical elements, such as FLD, SLD, and aspherical glass, to minimize distortion and chromatic aberrations while delivering exceptional clarity and color fidelity. The high-response linear actuator (HLA) motor provides swift and precise autofocus, suitable for fast-moving subjects, while its weather-sealed construction ensures reliability in challenging environments. For added functionality, the lens features a manual aperture ring with both smooth and clicked settings, perfect for photographers and videographers seeking tactile control. Its close focusing distance of 15.8 inches adds versatility, enabling detailed close-up shots.