跟随调焦装置 follow focus attachment
跟踪调焦装置 follow focus attachment
调焦装置卡住 Focus Jam
自动调焦和消象散装置 automatic focus and stigmator
焦点调整装置 focusing device
具有调焦装置，可以进行散光和聚光调节。
Have and focus device, can carry on astigmatism and spotlight regulate.
自由变焦眼镜，是由可变焦镜片和调焦装置构成。
Disclosed is freely varifocal glasses, which comprises zoom lenses and a focusing device.
文中介绍了自动调焦装置的工作原理，并给出了技术指标，这种装置能解决中倍数生物显微镜的自动调焦问题。
The working principle is explained and technical performances are also given. This device is especially useful for microscopes with midmagnifying power.
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