Camera

• aperture

  A device that controls amount of light admitted.

• finder

  Optical device that helps a user to find the target of interest.

Also contains

• astronomical telescope

  Any telescope designed to collect and record electromagnetic radiation from...

• prism

  Optical device having a triangular shape and made of glass or quartz; used to deviate a beam...

• equatorial

  A telescope whose mounting has only two axes of motion, one parallel to the Earth's axis...

• solar telescope

  A telescope designed to make observations of the sun.

• collimator

  A small telescope attached to a large telescope to use in setting the line of the larger...

• transit instrument

  A telescope mounted on an axis running east and west and used to time the transit...