- 测距: range finding; distance meas ...
- 透镜: lens; optical lens
- 变焦距透镜: variable focal length lens; variable focus lens; zoom lenses
- 长焦距透镜: long focal length lens; long focus lens; long-focal length lens; long-focal lens; long-focus lens
- 短焦距透镜: short focal length lens; short focal lens; short focus lens; short focus objective; short-focus lenses
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