Brand Name : 7artisans Number of Diaphragm Blades : 7 Blades Scene Type : Wedding,Business,HUMAN,Sports,Insect,Architecture,Special,Scenery,Still Life,Travel,People,Night Scene,Starry Sky Launch Date : 2022 Type : Fixed Focus Lens Focal Length : 4mm Focus Type : Fish-eye Lens Origin : Mainland China Full Frame : No Focus Mode : MF Lens Type : Manual Weight : 201g-300g Package : Yes Model Number : 4mm F2.8 Minimum Aperture : F16.0 Maximum Aperture : f/2.8 Use : Camera Angle of View : 225° minimum focusing distance of : 0.85m Lens Size : 60*54mm Lens material : Metal Aperture ring : D-clicked