The oculist from whom you obtained your lenses will tell you their magnifying power.
The Argand lamp of 1812 was not at all powerful and the lenses used were far from perfect.
Finally the lenses have to be centred, an essential operation in this case.
She looked through the lenses and gave a cry of astonishment.
Pupils, lights and lenses, all came to a glittering focus on me.
He pointed upward, and the lenses of the cameras followed his finger.
She is a manufacturer of lenses, and has been experimenting on microscopes.
And you shall have 265 these glasses just as soon as the lenses can be ground.
Got to have it for lenses and controls for the fifth-order forces.
In an upper story I placed my telescopes and lenses, my crucibles and retorts.