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- variable focal length mirror 可变焦距镜
- electrooptic variable focal length lens 电子光学变焦透镜
- variable focal length (cylindrical) lens 变焦(距)(圆柱)透镜
- objective with variable focal length 可变焦距物镜,变焦距物镜
- Variable Focal Length Zoom Lenses 可变焦伸缩镜头
- variable focal length cylindrical lens 变焦(距)透镜
- A full - length mirror; a full - length robe. 大穿衣镜;长可及跟的袍子。
- lens of variable focal length 可变焦距透镜
- variable focal length 变焦
- The second property concerns the brightness of a projected image, which depends on the focal length and facial, or surface, area of the imaging mirror. 第二项考虑的特性是投影的明亮度，这要视焦距与镜面（镜子的表面）而定。
- variable focal length lens 变焦距透镜
- A typical lens has a focal length(f)of 625 mm. 常见镜头的焦距（f）为625毫米。
- Determine the focal length of your lens. 决定你镜头的焦距。
- C: Can I control the focal length? 我能控制焦距吗?
- What is the best focal length for bird photography? 拍摄鸟儿最适合的焦距长度是多少?
- My finding about the unlikely focal length of the putative projection mirror has a second implication, even more constraining to the Hockney theory. 既然设想中投射镜的焦距不太可能实现，我的发现还延伸出第二个推论，更使霍克尼的理论受限。
- The focal length of a given lens is different for different colors. 一个特定的透镜的焦距因颜色的不同而不同。
- The focal length is set to Flat stitch in the Properties window. 焦距在特性窗囗中被设定成平坦的一针。
- The full length mirrors came in handy. 那面镜子就有用了。
- This photogragh is shot by lens with a long focal length. 这张照片是用长镜头拍摄的。
