English中文EspañolFrançais
field lens adjustment /ˈfiːld ˈlɛnz ɐdʒˈʌstmənt/ n

中文：场镜调节钮

中文 · 场镜调节钮Español · ajuste de la lente de campoFrançais · réglage du diaphragme
Meaning：Device with a variable-diameter opening that adjusts the amount of light illuminating the object.
▶ Start interactive picture-tap lesson

Found in these illustrated scenes（1）

Binocular microscope

‹ Browse all scenes