我在一個外國網頁上看到一些相....那些相係顯示埋一些相機的setting的....但佢仲顯示埋個 meter個EV值....點解可以show埋EV值呢???


Info: Focal len: 125 mm, Shutter: 1/2000 sec, Aperture: F3.2, Meter: 12.2 EV, ISO 400, EF 70-200 mm F2.8 L, sRGB High Chroma (3), Av, RAW

i think this is purely a choice for camera maker company to write this information to Exif or not.