PLEASE BE ADVISED THAT THIS MODEL NEEDS TO BE PRE-ORDERED AND HAS AN ORDER LEAD-TIME OF APPROXIMATELY 2-4 WORKING DAYS. Warranty: 12 Months Manufacturer Warranty Specification: Lens construction: 15 Elements in 13 Groups, including 2 ED lenses and 2 Aspherical lenses Angle of View: 62 to 6.9 Degree Closest Focusing Distance: 0.45m Maximum Image Magnification: 0.23x (35mm equivalent Maximum Image Magnification 0.46x) Minimum Field Size: 75 x 55 mm Number of Blades: 7 Maximum Aperture: f 3.5(18mm) - f 6.3(180mm) Minimum Aperture: f 22 Dimension: Diameter 78 x 84.5mm