ART17-40mmF1.8DC(Canon RF Mount) Camera Type Mirrorless Corresponding Mount Canon RF Mount Sensor Format APS-C [DC] Lens Construction 17 elements in 11 groups (4 SLD, 4 aspherical elements) Canon RF Mount：76.5-37.1° Number of Diaphragm Blades 11 (rounded diaphragm) Minimum Aperture F16 Minimum Focusing Distance 28cm / 11.1in. Maximum Magnification Ratio 1:4.8 at f=40mm Filter Size φ67mm Dimensions (Diameter × Length) Canon RF Mount: φ72.9mm x 115.9mm / φ2.9in. x 4.6in. Canon RF Mount: 560g / 19.8oz. Edition Number A025 The three-digit code on the surface of the lens is to indicate the year the lens was first released. (Since it is different from the year of manufacture, the release year and edition number may not match depending on the mount.) Supplied Accessories POUCH.LENS HOOD LH728-02.FRONT CAP LCF-67 IV.REAR CAP LCR III Mount / Product Barcode Canon RF Mount：0085126 214722