Samyangs 20mm t19 ed as umc is a wide angle manual focus cine lenses for dslr cameras with full frame sensor size the flow of light is devised based on the uniqueness of the distance from glass to sensor in mirrorless cameras to create optimal performance the bright t19 aperture secures a fast shutter speed even under restricted lighting conditions to offer best quality images it will brighten up your everyday snapshots but also it creates an outstanding out of focus look by highlight