“I am looking,” replied the boy, who was focussing the objects that had startled his cousin.

Only, you are focussing it from one end, and I from another.

The focussing screen should be ruled as accompanying diagram.

You talk of 'focussing,' but what else, even in those minutes, were you in fact engaged in?

They are equally useful in focussing the shadows, or in giving them variety.

The binocular was handed at once, and after a great deal of focussing, handed back.

The greatest care should be taken in focussing the telescope.

What provision is made for moving or focussing the lamp in the reflector?

At the orbital velocity of the ship, focussing on the star was indeed a difficult thing to do.

Biddy having a habit of focussing her sense of humour on any female she doesn't wholly love, may not do Mrs. East justice.