The f-stop, otherwise known as the aperture, determines your depth of field (the area in focus) and how much light can pass through the lens to reach the sensor.
f制光圈(或称光圈)决定相机的景深(对焦区域)以及有多少光能通过镜头到达传感器。
2
Shall we stop down the lens?
我们要不要把光圈缩小一点?。
3
Because this is all manual, if you set anything other than the widest aperture on your lens it will stop down and the image on the screen will darken.