Pentax K-m/K2000 Operating Manual page 266

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Dynamic Range (D-Range)
Indicated with a value expressing the light level reproducible in an image.
This is the same as the term "Exposure latitude" used with silver halide film.
Generally, when the dynamic range is wide, too much bright and/or too
much dark areas are less likely to occur within the image, and when the
dynamic range is narrow, all image tones can be reproduced sharply and
accurately.
EV (Exposure Value)
Exposure value is determined by the combination of the aperture value
and the shutter speed.
EV Compensation
Process of adjusting the image brightness by changing the shutter speed
and/or 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 [Wide] and [Spot].
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.
ISO Sensitivity
The level of sensitivity to light. With a high sensitivity, images can be shot
with a high shutter speed even in dark places, reducing camera shake.
However, images taken with a high sensitivity are more susceptible to
noise.
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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 computer or for attaching to e-mail.