Pentax q Operating Guide

efore Using Your Camera

A histogram shows the brightness

distribution of an image.

The horizontal axis represents

brightness (dark at the left and bright

at the right) and the vertical axis

represents the number of pixels.

The shape and the distribution of the

histogram before and after shooting

tells you whether the exposure level

and contrast are correct or not, and lets you decide if you need to adjust

the exposure and take a picture again.

Understanding Brightness

When the brightness is correct and there are no overexposed or

underexposed areas, the graph peaks in the middle. If the image is

underexposed, the peak is on the left side, and if it is overexposed, the

peak is on the right side.

When the image is underexposed, the part to the left is cut off (dark

(underexposed) portions with no detail) and when the image is

overexposed, the part to the right is cut off (bright (overexposed) portions

with no detail).

This camera can be set so that it displays the Bright/Dark Area warning

during Capture or Playback mode.

Using the Histogram

Numb

f pi

xel

s→

Dark portions

Bright portions

(Dark) ←Brightness→ (Bright)

Dark (underexposed)

image

Image with few bright or

dark areas

Bright (overexposed)

image

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