单词	back focus
释义	back focus noun : the distance from the rear glass surface of a photographic lens to the focal plane when the lens is focused on a very distant object Word History First Known Use 1868, in the meaning defined above
随便看	kusha Kushan kushans kusimanse kusimansel Kuskokwim kuskus kussos kusti kusu kusum Kutahya kutaiah Kutaisi Kutani kutani ware Kutch Kutch, Gulf of Kutch, Rann of kutcha kutches Kutchin kutchins kuteera gum Kutenai

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