The Sigma 10-18mm f/2.8 DC DN Contemporary Lens for Sony E-mount is a versatile ultra-wide-angle zoom lens designed specifically for APS-C mirrorless cameras. Here are the key features and specifications:

Key Features

Compact and Lightweight Design: This lens is recognized as the world's smallest and lightest ultra-wide-angle zoom lens for APS-C cameras, measuring just 72.2mm in diameter and 62.0mm in length, with a weight of only 260g. This makes it highly portable for travel and outdoor photography.

Focal Length: It offers an effective focal range of 15-27mm (35mm equivalent), making it ideal for capturing expansive landscapes, architecture, and vlogging content.

Bright Aperture: The constant maximum aperture of f/2.8 allows for excellent low-light performance and the ability to create a shallow depth of field, enhancing bokeh effects in images.

Optical Performance: The lens is constructed with 13 elements in 10 groups, including three FLD (F Low Dispersion) glass elements and four aspherical elements, which help to minimize aberrations and enhance image sharpness across the frame.

Minimum Focusing Distance: With a minimum focusing distance of just 11.6cm (approximately 4.6 inches), this lens allows for creative close-up photography with a maximum magnification ratio of 1:4, making it suitable for unique portraits and still life shots.

Video Capabilities: Designed to minimize focus breathing, this lens is well-suited for video recording, providing smooth focus transitions that maintain a natural look during filming.

Push-On Petal Type Hood: The lens includes a newly developed push-on petal type hood that reduces size while effectively controlling flare and ghosting