反射镜头 Reflector lens 又称反射远摄镜头，镜面镜头。系天体望远镜等所用的类型，也可供单镜头反光相机的500—2000毫米的镜头使用。利用2个球镜，从焦距的比例看，镜筒短而粗，其特点是没有装光圈，小型轻量，便于操作。有的内装滤光镜，以ND滤光片取代光圈来调节光量。
她可以在反射镜头中看到自己被怪异地缩短了。
She could see herself in the reflecting lenses, which had grotesquely foreshortened her.
典型反射镜头的环状光圈导致失焦影像呈现明显的“亮环”效应。
The annular aperture of typical mirror lenses results in out-of-focus images with a pronounced 'bright ring' effect.
实际上，当你按下快门时，一套复杂的程序开启，包括镜头内光圈的设置、一块单镜头反射镜的升起和其他更多的步骤。
When you press the shutter release on the camera, a complex sequence of events occurs, including setting the aperture in the lens, flipping up the mirror of an SLR and a lot more.
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