elfwong wrote:
仍然是10-20mm...(恕刪)
我覺得您完全搞錯了
35mm的鏡頭來表示焦距 其實也是等效
在攝影上 所謂焦距就是視角
只是用35mm底片相機當一個標準 用以方便換算跟計算來獲得等效焦距
因為不是只有aps 還有120
為什麼用35mm底片相機 我認為可能跟好記有關係
35mm底片相機的50mm鏡頭 就是跟人眼相同的透視感
以上望遠 以下廣角
http://www.nikonusa.com/en/learn-and-explore/a/tips-and-techniques/understanding-focal-length.html
Nikon USA的文章，開頭就講到
Focal length, usually represented in millimeters (mm), is the basic description of a photographic lens. It is not a measurement of the actual length of a lens, but a calculation of an optical distance from the point where light rays converge to form a sharp image of an object to the digital sensor or 35mm film at the focal plane in the camera.
