Axis 2400+ Manuale Utente Scaricare il pdf (Pagina 25)

When using a camera outdoors, avoid viewing too

much ‘sky’. Due to the contrasting light, cameras auto-

matically adjust themselves to achieve a good light level

for the sky at the expense of making the landscape/

objects appear too dark. One way to avoid this problem

is to mount the camera high above ground. Always use

sturdy mount ing equipment to avoid vibrations caused

by strong winds.

Ampliﬁ er gain

In advanced cameras, the ampliﬁ er gain on the image

sensor can be adjusted. The higher the gain, the better

the camera’s performance in low light conditions.

Unfortunately, any noise within the sensor is ampliﬁ ed

as well. Use a high gain to get the best results in low

light conditions and a low gain if you want high-

quality images during good light conditions. Normally

this is handled automatically by the camera.

Shutter speed

In some cameras the shutter speed is determined auto-

matically; in particularly advanced models the shutter

speed can be controlled manually. Normally it should

be set to 1/50 or 1/60 second; a long exposure time

will give better performance in low light. If you want to

capture images of fast moving objects, choose a shutter

speed of e.g. 1/10 000 second.

An image from a camera where the image sensor ﬁ lters have been destroyed by the sun.

C AMERA BASICS

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Axis 2400+ Manuale Utente Pagina 25