• synonyms

focusing screen

noun Photography.
  1. See under reflex camera.
Show More

Origin of focusing screen

First recorded in 1855–60

reflex camera

  1. a camera in which the image appears on a ground-glass viewer (focusing screen) after being reflected by a mirror or after passing through a prism or semitransparent glass; in one type (single-lens reflex camera), light passes through the same lens to both the ground glass and the film, while in another type (twin-lens reflex camera), light passes through one lens (viewing lens) to the ground glass and through a second lens (taking lens) to the film, the lenses being mechanically coupled for focusing.
Show More

Origin of reflex camera

First recorded in 1925–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for focusing screen

Historical Examples of focusing screen

  • It is upon this focusing-screen in the roof that I see the fiducial lines by which I make all the adjustments.

    Inquiries into Human Faculty and Its Development

    Francis Galton

  • Nothing can be more convenient than the position of this focusing-screen for working purposes.

  • By slewing the focusing-screen as shown, a very good general focus for every ray may be obtained.

  • Just outside the camera, and in a line with the focusing-screen, is a clip carrying a vertical needle.

British Dictionary definitions for focusing screen

reflex camera

  1. a camera in which the image is composed and focused on a large ground-glass viewfinder screen. In a single-lens reflex the light enters through the camera lens and falls on the film when the viewfinder mirror is retracted. In a twin-lens reflex the light enters through a separate lens and is deflected onto the viewfinder screen
Show More
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012