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Digital Camera Glossary
Table of contents
The aperture refers to the opening of the lens. The size of the aperture determines the amount of light that is allowed through the lens. Common F-stop (aperture) values are F/2.0, F/2.8,F/3.5,F/5.6,F/8,F/16.
Aperture Priority Mode
The Aperture Priority mode can be found in most DSLR and SLR-like cameras and even some compact Digital Camera models. When using the Aperture Priority mode, the camera allows manual setting of the aperture and will auto-calculate the best shutter speed and other exposure settings.
All Digital Cameras feature the Auto Focus (AF) function. In AF mode a Digital Camera automatically focuses on the subject in the center of the image area. However, more and more Digital Cameras are incorporating a multi focus function with some models even providing the capability to select the focus area.
Digital zoom is enlargement by software process rather than true optical magnification. Digital zoom can cause significant reductions in image quality.
The EXIF standard supports the storage of extended camera information within the header of each JPEG file. Close to all digital cameras use the EXIF format which records image data such as the time & date, ISO, shutter speed, aperture values, zoom, white balance, and other details.
Manual Focus mode allows a user to manual control the lenses and set the distance to the subject. It is mainly designed for users who need to shoot in low light conditions, or use macro or special effects. DSLRs and some SLR-like cameras may feature a focusing ring on the lens.
Unlike digital zoom, optical zoom is true optical magnification and has almost no negative impact on image quality.
Shutter speed is the amount of time the shutter remains open to allow light through the lens. The common shutter speed values are 10, 5, 1, 1/2, 1/4, 1/8, 1/15, 1/30, 1/100, 1/500/, 1/1000, 1/2000, 1/4000, measured in seconds. A smaller value corresponds to a faster shutter speed.
Shutter Priority Mode
Shutter Priority mode can be found in most DSLRs and SLR-like cameras and some compact Digital Cameras. When using the Shutter Priority mode, the camera allows manual setting of the shutter speed and will auto-calculate the best aperture size and exposure settings.
The viewfinder presents the image that the camera will take on a small, rear facing LCD screen or window. Viewfinders on digital cameras can also be considered as a focusing instrument. There are about four types of viewfinder on today’s digital cameras: Optical, Optical TTL, LCD TTL and EVF (TTL).
TTL = Through-The-Lens (you see exactly what the lens sees)
The White balance setting is used to compensate the color temperature of existing light to prevent inaccurate color reproduction.