from The Century Dictionary and Cyclopedia
- n. In photography, the material used in a camera upon which the image formed by the lens is seen.
Sorry, no etymologies found.
Nothing can be more convenient than the position of this focusing-screen for working purposes.
When the reflector is interposed, the image is wholly cut off from the sensitised plate, and is thrown upwards against this focusing-screen, _g_.
The apparatus, so far as it has been described with any detail, and ignoring what was said about an eye-hole, is little else than a modified copying-camera, by which an image of the transparency could be thrown on the ordinary focusing-screen, and be altered in scale and position until it was adjusted to fiducial lines drawn on the screen.
I do not use the ordinary focusing-screen at all in making my adjustments, but one that is flush, or nearly so, with the roof of the camera.
It is upon this focusing-screen in the roof that I see the fiducial lines by which I make all the adjustments.
For safety against the admission of light unintentionally, I have a cap to the focusing-screen in the roof, and a slide in the fixed body of the instrument immediately behind the reflector and before the dark slide.