[教程]F卡口，带内置CPU和F卡口的G型AF-S镜头
因为手中现有的器材中一直缺少一个超广角，经过再三的斟酌之后，最终选择了20定。选择它我主要是看中了其小巧轻便的外观及不错的画质表现，而且光圈比起自家的小牛广16mm--35mm F/4大出了2级，实乃拍摄星空之利器。77mm的口径与我现有的小钢炮80mm--200mm 和旅游头24mm--120mm口径一致，滤镜也可以通用，比起尼康的大灯泡14mm--24mm及腾龙的SP 15mm-30mm F/2.8 Di VC USD超大的口径及沉重的身躯,外出携带轻松了很多！毕竟，外出拍摄不光是只带一只镜头的． 令人惊喜的是，该镜头厂家所给的最近对焦距离是20厘米，但在实际使用中发现最近对焦距离可近至7厘米！这样偶尔客串一下微距镜头也不错，拍个小花小草的很方便 ！当使用Ｄ750机内的1.2倍及1.5倍裁切时则分别相当与24mm和30mm的焦段。
技术规格
类型： F卡口，带内置CPU和F卡口的G型AF-S镜头
格式 : FX/35mm
焦距：20mm
最大光圈： f/1.8
最小光圈：f/16
镜头结构： 13片11组（包括2枚ED 镜片组件，2枚非球面镜片组件，带纳米结晶涂层的镜片组件）
视角：• 尼康胶卷单镜反光与FX格式数码单镜反光照相机：94° • 尼康DX格式数码单镜反光照相机：70°
最近对焦距离：距离焦平面约0.2m
光圈叶片数量：7片（圆形光圈孔）
涂层：纳米结晶涂层
光圈叶片 : 全自动
测光:全开光圈
滤镜附件尺寸:77 mm (P = 0.75 mm)
尺寸:约82.5mm（最大直径）x 80.5mm（从照相机镜头卡口边缘开始的距离）
重量:约355g
自动对焦:是
AF-S（宁静波动马达）: 是
对焦模式:手动，手动/自动
G型:是
随机附件: 77mm快扣式镜头前盖LC-77，后镜头盖LF-4，镜头遮光罩HB-72，软镜头袋CL-1015
发布日期 : 2014/09/12
原产地：中国
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