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. There are now two 24mm I series options.The 24mm F2 Dg Dn | C is a new addition to the I series.24mm is a very popular wide-angle focal length, and each of these lenses has its own strengths and use cases at this focal length, which is why there are now two offerings.The new 24mm F2 Dg Dn | C is an addition to the fast F2 aperture group of I series lenses alongside the 35mm F2 and 65mm F2.