图像传感器尺寸与镜头焦距转换系数  

Converting Rate of Image Sensor Size and Lens Focal Length

作　　者：姚磊磊[1] 郭根生[1] 

机构地区：[1]山东师范大学传播学院,济南250014

出　　处：《影像技术》2010年第3期19-22,共4页Image Technology

基　　金：教育部人文社会科学一般项目成果(07JA860014)

摘　　要：数码相机图像传感器尺寸随相机的不同而不同,同样焦距的镜头在不同尺寸的传感器上,成像的视角也不同。所以仅仅以镜头的真实焦距,无法比较不同相机的拍摄范围(成像视角)。要想将不同尺寸图像传感器上成像的视角,转化为135相机上同样成像视角所对应的镜头焦距,就要了解镜头焦距转换系数的相关概念。Miscellaneous digital cameras are equipped with image sensors with different sizes;with the same lens focal length,the imaging view angle can vary with the size of image sensor;so,it’s impossible to compare the shooting range or imaging view angle of different digital cameras only according to the real focus of the lens.To convert the view angle of image sensors with different sizes into the respective lens focus of a 135 camera having the same imaging view angle,the requisite is to master the relevant concepts about the lens focus’ converting rate.

关 键 词：数码相机 图像传感器 镜头焦距 转换系数 

分 类 号：TB851.1[一般工业技术—摄影技术] TP333.53[自动化与计算机技术—计算机系统结构]