focal distance
focal length

It does not change the focal length of the system.

An 85-mm focal length was used to record the image.

But the need to consider the impact of focal length remains just as important.

But let's say you use the 28-millimeter focal length fairly often.

Do remember though, you are paying a lot of money for a camera with one single focal length.

The order is based on the focal length of the lens.

I need to know the focal length of the camera lens.

The standard lens would be of the 50mm focal length.

Variation in focal length is one of the chief benefits.

Hold up a paper in the reflected light, about two focal lengths from the mirror.