Born for F1.2 Large Aperture: The super large aperture of F1.2 opens up more possibilities in the drak night, with a higher shutter speed and a lower ISO. | Versatile Focal Length, Equivalent to 40mm: Embrace the versatile perspective of the 27mm, equivalent to approximately 40mm on full-frame, mirroring the human eye's natural viewpoint. With a minimum focusing distance of just 0.28m, this lens excels in close-up photography, capturing intricate details with the synergy of F1.2 aperture and extraordinary resolution. From candid snapshots to evocative portraits, this lens lets you express your vision in its truest form. | Tight Control of Optical Aberrations: An optical construction of 15 glass elements in 11 groups, can deliver high resolution at the maximum aperture setting. Additionally, chromatic aberrations are greatly reduced. | Take It All In: The 27mm focal length provides a 40mm equivalent focal length. while gives the most natural depth perspective. allowing this lens to cover a huge variety of genres and styles, from action-packed, everyday snapshots and creative street photography, to angular architectural scenes and sprawling landscapes. | Excellent Autofocus Outstanding Performance: The bulit-in lastest algorithm STM stepping motor provides the high driving force required for precises autofocus and tracking focus. It can also achieve fast, smooth, precise and quiet autofocus and tracking nuder extremely shallow depth of field. It also supports eye auto focus, animal focus and other recognition. Provide better response, lower latency and vibration.