lens finder的用法和样例：
例句
- Get a finder about the same angle of view of the taking lens, or a little longer.
在选择辅助取景器时可以考虑与所用拍摄镜头相同视角或者较其略微广角的取景器。 - I appraised the light, adjusted the lens setting and distance, locked a bulb in the flashgun, raised the camera and composed the scene in the viewfinder.
于是，我对好光，调好焦距，又安了一个闪光灯泡，然后举起像机，将这一场面在取景器中定格。
