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| relative Apertur | |||
| Öffnungsverhältnis n; relative Öffnung | |||
| geometrisch-optische Lichtstärke; relative Öffnung (the ratio of the focal length of the lens to the diameter of its effective aperture) | |||
| relatives Apertur; Oeffnungsverhaeltnis m | |||
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relative aperture : 6 phrases in 4 subjects |
| Earth sciences | 1 |
| Optics branch of physics | 1 |
| Radiation | 1 |
| Technology | 3 |