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所谓中焦镜头,是中等焦距镜头的简称。以135相机为例,50mm至200mm焦距左右的一般称为中焦镜头。中焦镜头的焦距大于标准镜头,而又小于大长焦镜头,中焦镜头有很多自身的优点,如85～135mm左右的中焦镜头,影像的畸变小,非常适合拍摄人像,因此多数优秀的人像镜头都集中在这个焦距。焦距再长一些的中焦镜头的优点是中远距离拍摄,这个
The so-called focus lens, is short of the middle focal length lens. Taking a 135 camera as an example, a focal length of about 50 mm to 200 mm is generally referred to as a coke lens. The focal length of the coke lens is larger than that of the standard lens and smaller than that of the large telephoto lens. The coke lens has many advantages such as a coke lens of about 85 mm to 135 mm. The distortion of the image is small and it is suitable for portraits. Therefore, most excellent Portrait lenses are concentrated in this focal length. The advantage of the longer focal length of the coke lens is the long-range shooting, this