I've got...I've got a camera and a lens cap to protect myself with.

我只有...我只有摄像机和镜头盖来保护自己。

Well, Did you tell me to take off the lens cap? Next time, be more specific.

但你没告诉我要把镜头盖取下？拜托下次教详细点。

He snapped off the shots rapidly, even taking a few with the lens cap on.

他迅速拍下照片，甚至还盖上了镜头盖拍了几张。

Then, considering that the numbers showed up even in the shots taken with the lens cap on, he realized the most likely light source was some kind of penetrating ray.

然后，考虑到即使在镜头盖上拍摄的照片中也会出现这些数字，他意识到最有可能的光源是某种穿透光线。