Definition of microprism in English:

microprism

Line breaks: micro|prism
Pronunciation: /ˈmʌɪkrə(ʊ)ˌprɪz(ə)m/

noun

[usually as modifier]
  • An area of the focusing screen of some reflex cameras which is covered with a grid of tiny prisms and splits up the image when the subject is not in focus.
    More example sentences
    • An array of lenticular microlenses may be positioned to accept the output of the microprisms so that the light exiting from the microlenses is a substantially collimated light source.
    • Plain screens are available without the central split-image and microprisms, and these are suitable for × 1 to about × 4.
    • Be careful to position your eye in the center of the finder to be able to see all the microprisms; some will black out if your eye is uncentered.

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day mage
Pronunciation: māj
noun
a magician or learned person