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Appendixes

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Glossary

A speed light that helps to create adequate exposure in low-light 
conditions.

The distance from the middle of the lens to its focal point (in 
millimeters). Longer focal lengths result in narrower angles of view 
and the subject is magnified. Shorter focal lengths result in wider 
angles of view.

The physical part of a digital camera that contains a photosite for 
each pixel in the image. Each photosite records the brightness of 
the light that strikes it during an exposure. Common sensor types 
are CCD (Charge-coupled Device) and CMOS (Complementary 
Metal Oxide Semiconductor).

The sensitivity of the camera to light, based on the equivalent film 
speed used in a film camera. At higher ISO sensitivity settings, 
the camera uses a higher shutter speed, which can reduce blur 
caused by camera shake and low light. However, images with 
high sensitivity are more susceptible to noise.

A format for writing printing information, such as selected images 
and number of prints, on a memory card. DPOF-compatible 
printers, sometimes available at photo shops, can read the 
information from the card for convenient printing.

All the combinations of the camera’s shutter speed and lens 
aperture that result in the same exposure.

This feature allows you to quickly adjust the exposure value 
measured by the camera, in limited increments, to improve the 
exposure of your photos. Set the EV compensation to -1.0 EV to 
adjust the value one step darker and 1.0 EV to one step brighter.

A specification to define an image file format for digital cameras 
created by the Japan Electronic Industries Development 
Association (JEIDA).

The amount of light allowed to reach the camera’s sensor. 
Exposure is controlled by a combination of the shutter speed, the 
aperture value, and ISO sensitivity.