Canon EF 8-15mm F4 L Fisheye USM

Canon EF 8-15mm f/4L Fisheye USM Lens Lens • Lens Type: L-Series Fisheye Zoom Lens • Lens Mount: Canon EF Mount • Compatible Formats: Full-Frame, APS-H and APS-C EOS Cameras • Focal Length: 8–15mm • Maximum Aperture: Constant f/4 • Minimum Aperture: f/22 • Lens Construction: 14 Elements in 11 Groups • Diaphragm Blades: 7-Blade Circular Aperture • Image Stabilizer: No • Marketed: July 2011 Fisheye Coverage • Full-Frame at 8mm: 180° Circular Fisheye • Full-Frame at 15mm: 180° Diagonal Fisheye • APS-H / APS-C: Rectangular / Full-Frame Fisheye Images • Maximum Angle of View: 180° Optical Design • Lens Construction: 14 Elements in 11 Groups • UD (Ultra-Low Dispersion) Glass: Used • High-Precision Glass-Molded Aspherical Element: Used • SWC (Subwavelength Structure Coating): Yes • Fluorine Coating: Applied to front and rear lens surfaces • Flare & Ghosting Reduction: SWC helps minimize flare and ghosting Autofocus & Focusing • AF Motor: USM (Ultrasonic Motor) • Focusing System: Inner Focusing with Focus Cam and Floating Mechanism • Autofocus: Supported • Closest Focusing Distance: 0.15m according to Canon Global Camera Museum • Maximum Magnification: 0.34× Aperture • Maximum Aperture: Constant f/4 • Minimum Aperture: f/22 • Diaphragm Blades: 7 • Circular Aperture: Yes Filter • Front Filter Thread: None • Filter System: Rear Gelatin Filter Holder • Canon U.S.A. Specification: Accepts up to 3 pre-cut gel filters Construction & Protection • Canon L-Series: Yes • Dust-Resistant Construction: Yes • Moisture / Drip-Resistant Construction: Yes • Fluorine Coating: Front and rear lens surfaces • Professional-Grade Construction: Designed for demanding shooting environments Dimensions & Weight • Maximum Diameter: 78.5mm • Length: 83.0mm • Dimensions: Approx. Ø78.5 × 83.0mm • Weight: Approx. 540g / 19.1 oz.