In the era of mirrorless cameras, the balance between performance and size is even more crucial. There is a growing demand for "compact, high-performance, high-quality lenses" and SIGMA responds to this call with the "I" series of full-frame mirrorless exclusive lenses. Available for L-Mount and Sony E mount, DG indicates full-frame sensor coverage, and DN indicates mirrorless-exclusive design. The I Series represent a new option: Premium, Compact Primes that are stylish in appearance, with impressive specifications and optical performance. Introducing the 90mm F 2.8 DG DN | Contemporary lens. With its versatile mid-telephoto focal length, the lens is the longest I series lens yet, but still remains remarkably compact and light so is ideal for day-to-day use. 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 90mm F 2.8 DG DN | Contemporary shares the same 64mm maximum diameter and 55mm filter size as the 24mm F 3.5 DG DN | Contemporary and the 45mm F 2.8 DG DN | Contemporary, making them a natural trio, especially for filmmakers who use filters more regularly