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: 16 Elements in 15 Groups, including 3 ED Lens Elements Angle of View: 24 to 6 Degree Closest Focusing Distance: 3.9 feet/1.2m Maximum Image Magnification: 0.21x ( 35mm equivalent Maximum Image Magnification 0.42x ) Minimum Field Size: 82.4 x 61.9mm Number of Blades: 9 Maximum Aperture: f 2.8 Wide - f 3.5 Telephoto Minimum Aperture: f 22 Dimension: Diameter 83 x 157mm