...Then, as objects came slowly into focus beforehis eyes, he knew that above him a ray of light was strikingslantingly through the thick glass of a control-room lookout... 
Various 「Astounding Stories, August, 1931」
...A moment they sharpened in their gaze as he brought his visitor into focus...
Rafael Sabatini 「Captain Blood」
... He moved to shut the door, and came backinside my focus opposite the window...
John Buchan 「Prester John」
..." It is often impossibleto get every object in the field in focus at one time;—lookonly at that which is in focus, and be blind to allthe rest...
Henry J. Slack 「Marvels of Pond-life」
...It should be simply treated with a mildantiseptic ointment, while the constitutional weaknessis the focus for attention...
Mrs. Leslie Williams 「A Manual of Toy Dogs」
...But, in spite of all the safest precautions and thesoundest measures of preparation, it would most likely have baffledhuman skill, and neither been held aloof nor stifled in its focus...
Honoré Bourguignon 「On the cattle plague: or, Contagious typhus in horned cattle. Its history, origin, description, and treatment」
...Amongthe Ainos the Bear is what psychologists rather oddly call the main“food focus,” the chief “value centre...
Jane Ellen Harrison 「Ancient Art and Ritual」
...In nature theyare out of focus when one is looking at an object, but in apainting the background is necessarily on the same focal plane asthe object...
Harold Speed 「The Practice and Science Of Drawing」
...This helps the unity of impression, which withboth eyes realised to so intense a focus might have suffered...
Harold Speed 「The Practice and Science Of Drawing」
...A Focus is that point at which converging rays meet...
Henry H. Snelling 「The History and Practice of the Art of Photography」
... The point behind areflecting surface, from which they appear to diverge, is called thevirtual focus...
Henry H. Snelling 「The History and Practice of the Art of Photography」
...Rays of light may be collected in the focus of a mirror to suchintensity as to melt metals...
Henry H. Snelling 「The History and Practice of the Art of Photography」
... The landscape to be delineatedis viewed either through the small lens, g, or with the naked eye onthe ground glass plate H, the focus being adjusted by the screw I...
Henry H. Snelling 「The History and Practice of the Art of Photography」
...—The slide to regulate the focus to the plate holder...
Samuel D. Humphrey 「American Handbook of the Daguerrotype」
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