Pentax K10D Operating Manual page 228

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EV Compensation
Process of adjusting the image brightness by changing the shutter speed
and aperture value.
Exif (Exchangeable image file format for digital still camera)
A standard digital camera file format established by the Japan Electronics
and Information Technology Industries Association (JEITA).
Focus point
Position in the viewfinder that determines focus. In this camera, select
from [Auto], [Select] and [Center].
Histogram
A graph that shows the darkest and brightest points in an image. The
horizontal axis represents the brightness and the vertical axis represents
the number of pixels. This is useful when you wish to refer to the exposure
status of an image.
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JPEG
An image compression method. In this camera, select from C (Best),
D (Better), or E (Good). Images recorded in JPEG format are suited for
viewing on your PC or for attaching to e-mail.
Mired
Proportional scale of measurement that consistently shows color change
per unit. Determined by multiplying the inverse of the color temperature by
1,000,000.
ND (Neutral Density) Filter
A filter with many saturation levels that adjusts the brightness without
affecting the color tone of pictures.
Noise Reduction
Process to reduce noise (image roughness or unevenness) caused by low
shutter speed.
NTSC/PAL
These are video output formats. NTSC is mainly used in Japan, North
America, and South Korea. PAL is mainly used in Europe and in China.