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在2008年及目前的数码单反相机市场上,佳能5D MarkⅡ、索尼α900、尼康D700和D3x都是吸引眼球的热门产品。这些热点机型有一个相同的关键性规格即全画幅感光元件,全画幅是我们今天要着重介绍与讨论的。由于数码单反相机是基于135单反相机系统的,所以其许多指标都用135相机作参照,而这其中首当其冲的指标就是画幅。目前的数码单反相机有四种画幅规格,即135全画幅、镜头焦距转换系数为1.3的APS-H画幅、镜头焦距延伸系数分别为1.5、1.6、1.7的APS-C画幅和镜头焦距转换系数为2的4/3规格画幅。
In 2008 and the current digital SLR camera market, Canon 5D Mark II, Sony α900, Nikon D700 and D3x are eye-catching hot products. These hot models have the same key specifications that full-frame sensor, full frame is to focus on our introduction and discussion today. Because digital SLR cameras are based on the 135 SLR camera system, many of their specifications are referenced to the 135 camera, and the one that bore the brunt of this was the frame size. The current digital SLR cameras have four frame specifications, that is, 135 full frame, the lens focal length conversion factor of 1.3 APS-H frame, the lens focal length extension coefficients were 1.5,1.6,1.7 APS-C frame and lens focal length conversion factor of 2 4/3 specification frame.