Camera.StartExposure Method
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CameraStartExposure Method

Starts an exposure. Use ImageReady to check when the exposure is complete.

Namespace:  ASCOM.DriverAccess
Assembly:  ASCOM.DriverAccess (in ASCOM.DriverAccess.dll) Version: (
public void StartExposure(
	double Duration,
	bool Light


Type: SystemDouble
Duration of exposure in seconds, can be zero if Light is false
Type: SystemBoolean
True for light frame, False for dark frame (ignored if no shutter)


ICameraV2StartExposure(Double, Boolean)
InvalidValueExceptionNumX, NumY, BinX, BinY, StartX, StartY, or Duration parameters are invalid.
InvalidOperationExceptionCanAsymmetricBin is False and BinX != BinY
NotConnectedExceptionthe exposure cannot be started for any reason, such as a hardware or communications error

A dark frame or bias exposure may be shorter than the V2 ExposureMin value and for a bias frame can be zero. Check the value of Light and allow exposures down to 0 seconds if Light is False. If the hardware will not support an exposure duration of zero then, for dark and bias frames, set it to the minimum that is possible.

Some applications will set an exposure time of zero for bias frames so it's important that the driver allows this.

See Also