照相机镜头有两项一般属性：f制光圈和焦距。
Camera lenses have two general attributes: f-stop and focal length.
总而言之，如果有可能使用到反光照相机，那是最好的，因为他们有最大的反光镜阵列以及最少的噪点，可移动的镜头以及安全的RAW格式。
To sum up it has to be said that if it is possible to use a reflex camera - it is great, as they have large matrices with little rate of noises, removable optics and safe RAW format.
除了保护特殊镜头的质量，这款照相机有一个限制框可以让你在35 mm的胶卷上拍正方形的照片——或者想它的老同志那样让画面周围有一圈暗角。
In addition to maintaining idiosyncratic lens quality, the camera has a framing mask that lets you shoot square photos on 35-mm film-or even bleed the image to the edge like its old comrades.
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