Castro+Johnson

Depth of field: Depth of field is the range of distance within the subject that is acceptably sharp. The depth of field varies depending on camera type, aperture and focusing distance, although print size and viewing distance can influence our perception of it.



Shutter Speed: Shutter speed, or more literally exposure time, is measured in seconds. Shutter speed changes the way movement appears in the picture. Very short shutter speeds are used to freeze fast-moving objects. Very long shutter speeds are used to intentionally blur a moving object.



Noise: Noise is to much pixilation for a digital photo. Noise occurs when the image is taken in usually bad lighting, and their is noticeable dots all over the picture. Some artists intentionally add noise to their photos to make them more interesting.

Histogram: A histogram is a graph that allows you to judge the brightness of an image. It tells you whether or not your picture is too dark, too bright, or has a balance between light and dark.

Burst Mode: This is a mode on the SLR that allows the photographer to take multiple pictures in secession with one click of the shutter. This mode is used to take pictures of subjects in motion.



File Format: Define each and explain how they differ from each other. .tiff – Tagged Image File Format- A file format used for storing images

.jpeg – Joint Photographic Experts Group- This file format is used to lossy compress photos. This then allows for a person to edit the picture better. It allows for a large range of pixilation.

.raw – They contain minimally processed data from the image sensor. These pictures are not ready to be printed without editing. This are also called digital “negatives”



**White Balance:** White balance is a camera setting that adjusts for lighting in order to make white objects appear white in photos. This is more difficult than it might seem due to the fact that light cast from different sources is different in color (technically called temperature).

 **Self timer:** A self timer is a device on a camera that, when enabled, gives a delay between the pressing of the shutter release and the shutter firing. It is most commonly used to allow photographers to take a photo of themselves, hence the name.


 * [[image:self_timer.jpg]]

Pixels:** are single points in a raster image. The pixel is the smallest addressable screen element, it is the smallest unit of picture which can be controlled.

**Auto Focus vs Manual Focus:** (explain what they are and then explain when you would choose each and why?)  A **utofocus-** is a feature of some optical systems that allows them to obtain correct focus on a subject, instead of requiring the operator to adjust focus manually. **Manual focus**- is where the operator has to adjust the focus of the lens by hand. 