Vocab Flashcards
ISO
International Standards Organization. Designation of different film speeds. For example, 400 ISO is for indoor or outdoor picture taking and 100 ISO is for outdoor picture taking only. The higher the ISO number, the fewer silver crystals per inch/ fewer pixels per inch. In other words, there will be more space between crystals/pixels and the image will appear more grainy. The lower the ISO, the sharper the final photo will be. The concept of ISO is similar between film and digital although not exactly the same.
Emulsion
A gelatin coating on both film and paper that holds the light sensitive silver crystals on the plastic or paper backing.
Shutter
The part in the camera that opens and shuts for a specific amount time, letting light onto the film. Similar to a window shade or the eyelid of your eye.
Shutter Speed
The time the shutter is open letting light onto the film. 1/60 of a second is where motion is usually stopped. All of the numbers on the shutter speed dial are fractions of 1 second.
B 1 2 4 8 15 30 60 125 250 500 1000
Aperture
Also referred to as f-stop, a ring of metal “leaves” that opens to let in a specific amount of light. Aperture also controls the depth of field, or the distance the camera can see in focus. This opening is similar to the pupil of the eye and is the physical opening inside the lens.
F-stop
The degree to which the leaves are open letting light onto the film. The f-stops are the numbers on the ring around the lens, closest to the body of the camera. The larger the opening, the more light is let in but the less the camera sees in focus. The smaller the opening, the less light is let in but the more the camera can see in focus (like squinting with your eyes).
Depth of Field
The distance from the nearest to the farthest object that the camera sees in focus.
The larger the aperture/smaller f-stop number = the smaller the depth of field
The smaller the aperture/larger f-stop number = the greater the depth of field
Macro Lens
placed over a regular lens, loses some sharpness because
of the double lenses. This lens allows you to see more than you can see with the naked eye. It is for getting very close-up from close.
Zoom Lens
variable focal length, is possible to vary image size while keeping the subject in focus, no need to change lenses, much more flexible. You can recognize a zoom lens because the lens is labeled with 2 numbers (Ex. 70mm-150mm) - where the lens starts and stops.
Telephoto Lens
long focal length, larger image, tends to exaggerate apparent distances. Any lens with a measurement higher than 50mm (Ex. 90mm, 200mm, 350mm).
Wide Angle Lens
objects in front of focal point as well as things in the distance are both in relatively good focus. This lens allows you to get closer to the subject while retaining more information side to side (think: peripheral vision). Very wide angle lenses can often have some distortion around the edges. Any lens with a measurement lower than 50mm (Ex. 18mm, 24mm).
Standard Lens
50 mm lens is what usually comes with an SLR body. Designed to take in a field of view roughly equal to the eye or 54 degrees.
Camera Obscura
just a large box with a pinhole that projects an image (upside down) to aid in drawing or just to view.
Box Camera
fixed lens, just a box with a simple shutter. Only works well in ideal conditions (sunny and clear).
Twin Lens Reflex
the lower lens is the taking lens and the top lens is the viewing lens. Often problems with framing due to different views.