sigma 14mm f1.4 dg dn art lens

The Sigma 14mm f/1.4 DG DN Art lens is a specialized lens designed for astrophotography and wide-angle shooting. It offers an expansive 114° angle of view on full-frame cameras and a full-frame equivalent focal length of 21mm on APS-C models. The lens features a fast maximum aperture of f/1.4, allowing for excellent low-light performance and shallow depth of field.

To enhance its astrophotography capabilities, the lens comes with various features. It includes a tripod socket for stable mounting, a manual focus lock switch for precise focusing, a lens heater retainer to prevent fogging in cold weather, a rear filter holder, and filter slots for astrophotography applications.

The optical design of the lens incorporates 1 SLD (Special Low Dispersion) element, 3 FLD (Low Dispersion) elements, and 3 aspherical elements, which work together to deliver exceptional sharpness and minimize aberrations. The lens also effectively eliminates sagittal coma flare, preserving the shape of stars, and employs super multicoating to reduce ghosting and flare when capturing starry skies and long exposure night scenes.

For focusing, the lens features an HLA (High-Response Linear Actuator) autofocus motor, which enables fast, quiet, and accurate autofocus performance. It also includes a dedicated aperture switch that allows you to switch between clicked and de-clicked operation, providing versatility in different shooting scenarios.

The lens is constructed with a combination of Thermally Stable Composite (TSC) material and traditional metals, making it durable and capable of withstanding various temperature conditions. Additionally, the lens incorporates a brass bayonet mount for secure and reliable attachment to the camera.