By jury-rigging a microscope with a bellows camera, Bentley was able to capture for the first time the exquisite delicacy of a snowflake.
由于本特利在风箱照相机前加装了一个显微镜头，因此他首次捕获到的雪花图案相当精致。
Camera extension: the length of bellows in a process camera. It is the distance between the lens diaphragm and the image plane.
暗箱：制版照相机上可以伸缩的部份，它连接起镜头和影像平面。
It is camera bellows operation completely!
完全是暗箱操作！
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