The 7Artisans M35mm f2.0 lens optical system contains 7 elements in 5 groups. Its optical design is based upon the Sonnar formula. The lens has an aluminum body and features durable brass multi-thread mechanics. 35mm is a classic 35mm focal length due to its close approximation to human perspective and field of view. It works great for isolating the subject from the background if shooting at F/1.1, or maintaining a deep focus, allowing the viewer to see a sweeping landscape behind the subject. With its advantageous compact size, this focal length is frequently used by countless photography enthusiasts and professionals alike. The wide focal length and compact form factor make this a great lens for shooting documentary footage and stills.