The difference between cook lens 5i and 7i.

5/i is specially designed for all professional film cameras and electronic cameras with PL interface. The 7/i lens is designed for the emerging Quan Huafu sensor, which can cover the sensing area of the whole imaging circle at the highest.

I technology can provide photographers with important information such as lens settings, focal length, aperture and depth of field, hyperfocal distance, serial number, user data, lens type and focal length. Successfully capture all information for post-production.

The optical design of 5/i lens can ensure the best performance under full aperture and completely control halo, distortion and spherical aberration. All 5/i fixed-focus lenses can really reach the aperture of T 1.4, including over 35mm frames.

7/i fixed-focus lens is a professional film and electronic camera providing /i technology, which is suitable for all PL interfaces. /i technology provides important information for cinematographers and photographic assistants, such as lens setting, focusing distance, aperture and depth of field, hyperfocal distance, serial number, user data, lens type and metric and British focal lengths. The zoom lens will display zoom. 7i can shoot 35mm, super 35mm, Quan Huafu and above formats.