AVer SD1306 user manual - Manual (Page 54)

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System > Image> Advanced
Click Default button will back to factory default setting.
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Shutter Time: Adjust the shutter time level to get the best image quality.
- Auto: Both the iris and shutter are adjusted by the camera automatically.
- IRIS: You can adjust the aperture open or closed. The smaller the "F" value you select, the
larger the aperture opens and the brighter the image becomes. The shutter time is adjusted by
the camera automatically.
- Shutter time: You can adjust the shutter time. The shorter the shutter time you select, the
darker the image becomes. The iris is adjusted by the camera automatically

IRIS Level: The higher the Iris level you select the more light the camera gets and the image
becomes brighter. However, it will not affect the true iris opening or closing that you select in auto
electronic shutter options.

Sense-UP: The main purpose of sense-up is to provide a camera technology that does not rely on
artificial light to see in very low light conditions. The shutter stays open longer, allowing more light
into the camera and seeing better in low light. When there is a moving object in the image and the
faster the object moves, the worse the image appears (blurriness). When you enable sense-up
option, users are not allowed to adjust the shutter time manually in "Auto Electronic Shutter"
option.