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Appendix > Glossary
ISO sensitivity
The sensitivity of the camera to light, based on the equivalent lm speed
used in a lm camera. At higher ISO settings, the camera can use a higher
shutter speed to reduce blur caused by camera shake and low light.
However, images with a high ISO setting are more susceptible to noise.
JPEG (Joint Photographic Experts Group)
A lossy method of compression for digital images. JPEG images are
compressed to reduce their overall le size with minimal deterioration of
the image resolution.
Metering
The metering refers to the way in which the camera measures the quantity
of light to set the exposure.
MF (Manual Focus)
A system that manually focuses the camera lens on the subject.
You can use the focus ring to focus on a subject.
Histogram
A graphical representation of the brightness of an image. The horizontal
axis represents the brightness and the vertical axis represents the number
of pixels. High points at the left (too dark) and right (too bright) on the
histogram indicate a photo that is improperly exposed.
HEVC
High-eciency Video Coding format, established by the international
standard organizations ISO-IEC and ITU-T. This codec is capable of
providing good video quality at low bit rates.
Image sensor
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).
IP (Internet protocol) address
An IP address is a unique number that is assigned to every device that is
connected to the internet.