Specification Brand : Sigma BulletPoint1 : Hyper sonic motor ensures a quiet, high-speed autofocus BulletPoint2 : Inner focusing system allows attachment of petal-shaped hoods and filters BulletPoint3 : Special low dispersion glass for high image quality BulletPoint4 : Focal length: 100 to 300 millimeters BulletPoint5 : Designed for Canon digital SLR cameras Color : Black CompatibleMountings : Canon EF, Canon EF-S ExternallyAssignedProductIdentifier : 4961607835609 ExternallyAssignedProductIdentifier1 : 085126134549 ExternallyAssignedProductIdentifier2 : 0085126134549 ExternallyAssignedProductIdentifier3 : 00085126134549 FocalLengthDescription : 100-300 millimeters FocusType : Auto Focus FormFactor : DSLR FormFactor1 : SLR FormFactor2 : DSLR IncludedComponents : Lens Hood, Case, Strap, Sigma Four-Year Warranty IncludedComponents1 : Sony DT 18-55mm f/3.5-5.6 SAM II Lens IncludedComponents2 : Front and Rear Lens Caps IncludedComponents3 : Warranty ItemName : Sigma 100-300mm f/4 EX DG IF HSM APO Fast Aperture Telephoto Zoom Lens for Canon SLR Cameras ItemPackageDimensions_Height : 15.4 centimeters ItemPackageDimensions_Length : 32.6 centimeters ItemPackageDimensions_Width : 15.4 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : camera-lenses LensDesign : Zoom LensMount : canon_ef Manufacturer : SIGMA Material : Glass MaxAperture : 4 f_stop MaxFocalLength : 300 millimeters MaximumApertureRange : F5.6 MaximumFormatSize : APS-C MinAperture : 4 MinFocalLength : 100 millimeters ModelName : Sigma 100-300mm f/4 EX DG IF HSM APO ModelNumber : 134101 MountingType : Canon EF NumberOfDiaphragmBlades : 7 OpticalZoom : 3 multiplier_x PartNumber : 134101 PhotoFilterSize : 55 millimeters ProductDescription : This telephoto zoom lens provides a large F4 aperture at all focal lengths. The new multi layer lens coating and lens design reduce flare and ghosting, a common problem with digital cameras, and also creates an optimum color balance through the entire zoom range. Two Special Low Dispersion (SLD) glass elements in the front lens group and another two in the rear group offer excellent correction of chromatic aberration. High optical performance is demonstrated throughout the entire zoom range. The internal focusing and zooming mechanism do not change the lens' overall length, assuring ease of handling and operation. A rotating tripod mount can be conveniently detached if required. The Hyper Sonic Motor (HSM) ensures a silent, high-speed AF function as well as full-time manual focusing capability Since the front of the lens does not rotate, a circular polarizing filter and Petal-type hood can be easily attached. High-speed focusing is possible when this lens is used with dedicated APO 1.4x EX tele-converter. With the optional APO 1.4x EX tele-converter, this lens becomes a 140mm to 420mm F5.6 AF zoom. With the APO 2.0x EX tele-converter, a manual focus zoom lens from 200mm to 600mm F8 is achieved. ProductSiteLaunchDate : 2003-06-17T00:00:00-00:00 RealAngleOfView : 24.4 degrees StreetDate : 2006-05-04T00:00:01Z Style : US Version SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredDgHzRegulation1 : not_applicable SupplierDeclaredDgHzRegulation2 : not_applicable SupplierDeclaredDgHzRegulation3 : not_applicable SupplierDeclaredDgHzRegulation4 : not_applicable SupplierDeclaredDgHzRegulation5 : not_applicable UnspscCode : 45121603 ZoomRatio : 3:1