12mm F2.8 is an ultra-wide angle prime lens. Theoptical system consists of 10 elements in 8 groups and is adopting Distagonoptical design and inner rear focusing type. It is the most compact 12mm F2.8lens on current APS-C market. The lens is suitable for shooting scenes oflandscape, architecture, tourism, interior decorations and portraits, etc.Comparing to original the angle of view has been largely increased. The imagecorner resolution and distortion control have a visible improvements. Thousandof RMB retail price makes it the most affordable lens in APS-C compactmirrorless cameras format. 7artisans 12mm f/2.8 can produce even more creativeshots while using filter adapter with CPL and ND optical filters.