Axis M20 Series User Manual

Also see for AXIS M20 Series: Installation guide

AXIS M20 Bullet Camera SeriesThe device interfaceExposure mode: Select an exposure mode to reduce rapidly changing irregular effects in the image, for example flicker producedby different types of light sources. We recommend you to use the automatic exposure mode, or the same frequency as yourpower network.• Automatic: The camera adjusts the aperture, gain and shutter automatically.• Automatic aperture : The camera adjusts the aperture and gain automatically. The shutter is fixed.• Automatic shutter : The camera adjusts the shutter and gain automatically. The aperture is fixed.• Hold current: Locks the current exposure settings.• Flicker-free : The camera adjusts the aperture and gain automatically, and uses only the following shutterspeeds: 1/50 s (50 Hz) and 1/60 s (60 Hz).• Flicker-free 50 Hz : The camera adjusts the aperture and gain automatically, and uses the shutter speed 1/50 s.• Flicker-free 60 Hz : The camera adjusts the aperture and gain automatically, and uses the shutter speed 1/60 s.• Flicker-reduced : This is the same as flicker-free, but the camera might use shutter speeds faster than1/100 s (50 Hz) and 1/120 s (60 Hz) for brighter scenes.• Flicker-reduced 50 Hz : This is the same as flicker-free, but the camera might use shutter speeds fasterthan 1/100 s for brighter scenes.• Flicker-reduced 60 Hz : This is the same as flicker-free, but the camera might use shutter speeds fasterthan 1/120 s for brighter scenes.• Manual : The aperture, gain and shutter are fixed.Exposure zone: The exposure zone tells the camera to prioritize image quality in the most important part of the scene. Select thepart of the scene of greatest interest to calculate the automatic exposure levels, for example the area in front of an entrance door.NoteThe exposure zones are related to the original image (un-rotated), and the names of the zones apply to the original image.This means, for example, that if the video stream is rotated 90°, then the Upper zone becomes the Right zone in thestream, and Left becomes Lower.• Automatic: Suitable for most situations.• Center: Uses a fixed area in the center of the image to calculate the exposure. The area has a fixed size andposition in the live view.• Full : Uses the entire live view to calculate the exposure.• Upper : Uses an area with a fixed size and position in the upper part of the image to calculate the exposure.• Lower : Uses an area with a fixed size and position in the lower part of the image to calculate the exposure.• Left : Uses an area with a fixed size and position in the left part of the image to calculate the exposure.• Right : Uses an area with a fixed size and position in the right part of the image to calculate the exposure.• Spot: Uses an area with a fixed size and position in the live view to calculate the exposure.• Custom: Uses an area in the live view to calculate the exposure. You can adjust the size and position of the area.Max shutter: Select the shutter speed to provide the best image. Low shutter speeds (longer exposure) might cause motion blurwhen there is movement, and a too high shutter speed might affect the image quality. Max shutter works with max gain toimprove the image.Max gain: Select the suitable max gain. If you increase the max gain, it improves the visible level of detail in dark images, butalso increases the noise level. More noise can also result in increased use of bandwidth and storage. If you set the max gainto a high value, images can differ a lot if the light conditions are very different from day to night. Max gain works with maxshutter to improve the image.19