focusing screen
noun1
Arts, Hobbies, Lifestyle, Photography A flat translucent material found in a system camera that allows the photographer to preview the framed image in a viewfinder.
- Once the microgrid and split-image rangefinder became the major focusing controls, the focusing screen itself became a secondary or even tertiary focusing area and was/is generally ignored by many users.1993 July, Herbert Keppler, “SLR: Have manufacturers fouled up viewing screens for technological progress?”, in Popular Photography, volume 57, number 3, page 17:
- You can always see the covered area on the focusing screen regardless what the subject distance might be or what close-up accessories are used.2012, Ernst Wildi, The Medium Format Advantage, →ISBN, page 183:
1 more example
- This is because the reflex mirror in some SLR cameras is not quite long enough to provide full illumination of the entire focusing screen with the image from a telescope. Fortunately, such reduced illumination of the focusing screen will not affect your photograph.2012, Jeffrey R. Charles, Practical Astrophotography, →ISBN: