产品详细描述：MainFeatures:Ergonomic,angledgripinspecialmoisture-resistantpaintforcomfortableholdandfeel.FastZoomSpeed1.7secInternalfocusingreduceslateralchromaticaberrati***andimprovescornerperformanceSquarehoodreducesflaresandghosting.Easy-to-usemanualoperationring.Lightweight1.53kg.Highzoomratio19x.ShuttleShotBuilt-in2xExtender.LensYJ19x9BIRSApplication2/3"Semi-ProfessionalZoomRatio19xBuilt-inExtender2.0xRangeofFocalLength(Withextender)9~171mm18~342mm(2.0x)MaximumRelativeAperture(WithExtender)1:1.8at9~114mm1:2.7at171mm1:3.6at18~228mm(2.0x)1:5.4at342mm(2.0x)AngularFieldofView(WithExtender)4:3AspectRatio(6.4x4.8mm)52.1°x40.3°at9mm2.97°x2.22°at171mm27.5°x20.8°at18mm(2.0x)1.47°x1.11°at342mm(2.0x)MinimumObjectDistance(M.O.D.)0.9m(50mmwithMacro)ObjectDimensi***atM.O.D.(WithExtender)4:3AspectRatio(6.4x4.8mm)78.9cmx59.2cmat9mm4.3cmx3.2cmat171mm39.5cmx29.6cmat18mm(2.0x)2.2cmx1.6cmat342mm(2.0x)MacroYesSize(WxHxL)139.8x99.5x198.8mmMass(Approx.)1.53kg(3.37lbs)OperationalAccessoriesSemiservoMS-21/MS-22/MS-15)