The gravitational deflection focused light rays that were initially diverging onto paths that converged at the Earth.

引力透镜使得本来会发散的光芒聚焦在地球上。

Spherical reflectors don't perfectly focus all the incoming rays.

球面反射器不能完美地聚焦所有入射光线。

Then secondly, it passes a camera lens that helps us in focusing light rays and lastly, there is a camera film on which light is focused for a clear picture.

其次，它通过一个帮助我们聚焦光线的相机镜头，最后是相机胶片，光线聚集在相机胶片上，以获得清晰的图像。