Sigma has introduced two new lenses, the 24mm F2 DG DN and 90mm F2.8 DG DN, designed specifically for full-frame mirrorless cameras, and available in L-Mount and E-Mount. They are both part the the I series, which is Sigma’s range of premium compact primes for mirrorless cameras.

Both lenses offer an all-metal body, and have been designed to work with ultra-high-resolution cameras, for example the 61MP Sigma fp L and Sony Alpha A7R IV.

Sigma 24mm F2 DG DN I Contemporary

Sigma 24mm F2 DG DN I Contemporary

The Sigma 24mm F2 DG DN lens is a wide-angle lens with a bright F2 aperture, and has been designed to give excellent image quality, whilst also being compact and portable. The lens features 9 rounded aperture blades, and weighs 365g. The lens measures 70mm (diameter) x 72mm (length), and supports 62mm filters.

Sigma say the lens will be ideal for use in night sky photography, events and interiors, with special attention made to supress sagittal coma flare.

The lens is made up of 13 elements in 11 groups, with 1 FLD, 2 SLD and 2 aspherical lens elements. The Sigma 24mm F2 DG DN is provided with a magnetic metal lens cap, a petal-type lens hood, as well as front and rear caps.

Sigma 90mm F2.8 DG DN I Contemporary

Sigma 90mm F2.8 DG DN I Contemporary

The Sigma 90mm F2.8 DG DN lens is a mid-telephoto lens with an F2.8 aperture, manual aperture ring, and is designed to be a compact and portable prime lens, weighing just 295g. The lens measures 64mm (diameter) x 59.7mm (length) and uses a 55mm filter.

Sigma say the lens offers stunning optical performance, with “rich, smooth bokeh” making it perfect for portraits, close-ups, weddings and events. The lens has a minimum focusing distance of 50cm and a maximum magnification ratio of 1:5.

The lens is made up of 11 elements in 10 groups, with 5 SLD elements, and 1 aspherical lens element. The 90mm F2.8 DG DN is provided with a magnetic metal lens cap, lens hood, plus front and rear caps.

Both the Sigma 24mm F2 and Sigma 90mm F2.8 lenses feature internal focus, and weather-sealing to make them dust and splash resistant, as well as a manual aperture ring close to the camera body, with the focus ring towards the front of the lens. There’s also a large AF/MF switch on the side of the lens.

They will be available for £549.99 and available to puchase on the 24 September 2021.

The two new lenses introduced today bring the total number of Sigma I series lenses up to 6, joining the Sigma 24mm F3.5 DG DN, 35mm F2 DG DN, 45mm F2.8 DG DN, and 65mm F2 DG DN.

Sigma 90mm F2.8 DG DN

Sigma 90mm F2.8 DG DN I Contemporary

From Sigma: The SIGMA 90mm F2.8 DG DN | Contemporary boasts exceptional optical performance with a ultra-high resolving power to match the latest high-resolution mirrorless cameras.

The lens is built using the very latest optical technology, and includes five SLD glass elements. This helps to reduce axial chromatic aberration that cannot be corrected in-camera, allowing the lens to achieve high resolution and clear image quality with no color bleeding.

A high-precision glass molded aspherical lens provides both high resolution and beautiful bokeh. Photographers can enjoy shooting with soft, large bokeh without coloration and this is something that only a full-frame lens is able to deliver.

The lens also utilizes the camera’s optical correction functionality, which is an advantage of mirrorless systems, SIGMA’s optical designers were therefore able to concentrate on correcting aberrations that can only be corrected by the optical design, thereby improving rendering performance and reducing the size and weight of the lens.

With a minimum focusing distance of 50cm and a maximum magnification ratio of 1:5, close-up macro-style photography is possible. The lens highlights the subject, allowing photographers to focus in on fine details or create more abstract compositions.

The AF drive system incorporates a quiet, high-speed stepping motor, making it suitable for still images as well as video recording.