Chapter 4 Flashcards
Auxiliary Lens
optical device that alters the focal length of the primary lens for close up telephoto or other special effects photography
Aperture Priority
Setting that allows you to set the aperture while the camera adjust the shutter speed
Crank
Part of the mechanical film advancement system that activates the shutter cocking lever when the film is advanced
Curtain
The fabric or metal stretched between two spools in front of the film
Depth of Field Preview
The range of distance in which everything appears in sharp focus
Film Advance
The system used to move unused film into position to receive an exposure
Filter
A transparent optical device which alters the quality of light passing through the lens. Usually a specific type if light is blocked
Focal Plane Shutter
A camera’s shutter system consisting of sliding curtains. It is positioned in front of the film
Frame Counter
Device that counts the number of exposures taken or remaining
Iris/Leaf Shutter
A cameras shutter system consisting of an overlapping of metal sheets. It works like a light proof aperture
Parallax
The difference in images seen by the camera’s viewfinder and the lens
Pentaprism
A five wider mirrored prism which allows the same lens tone used for viewing, focusing, and taking an image
Shutter Cocking Lever
The devise that resets the shutter in order to take the next exposure
Shutter Priority
A camera setting that allows you to set the shutter speed while the camera sets the aperture
Shutter Release
A button or leaver that opens the shutter and exposes the film
SLR
A single lens reflects camera. Uses a pentaprism.
Supply spool
Spool that holds the unexposed the film
Take-up Spool
Spool that hold the exposed film
What is a camera?
A light tight box made to expose light sensitive material.
How does a camera take a photograph?
Light sensitive material is exposed through a light focusing lens by a controlled amount of light via the diaphragm (aperture) for a controlled duration (shutter).
What are the two types of shutters and how do they differ?
a. Leaf or Iris – uses overlapping plates which open and close like an aperture
b. Focal plane – uses one or two curtains made of metal or fabric. The curtains have windows that move between spools. When the window is moved in front of the film an exposure is made. SLR’s use this type of shutter.
What do the numbers 60, 125, 250, and 500 on the shutter speed dial signify?
Fraction of a second that indicates the length of an exposure.
What shutter speed, or faster, must be used when holding a camera by hand? Why?
a. 60
b. Slower shutter speeds result in camera shake and result in blurry images.
