Pentax WG-3 GPS User Manual

1

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 of the histogram 
before and after shooting tells you 
whether the brightness and 
contrast are correct or not, and 
lets you decide if you need to use EV compensation and take the picture again.

Understanding Brightness
If the brightness is correct, 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 portions) and 
when the image is overexposed, the part to the right is cut off (bright portions).
This camera has a function where overexposed areas are indicated as blinking 
red and underexposed areas as blinking yellow.
Understanding Contrast
The graph peaks gradually for images in which contrast is balanced. The graph 
peaks on both sides but sinks in the middle for images with a large difference in 
contrast and low amounts of mid-level brightness.

Setting the Exposure (EV Compensation) 1p.96

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←Brightness→