New capture parameters (such as exposure time or gain settings) can be transferred to the camera via software at any time. Depending on the operating mode, these settings will not always be immediately effective for next image, however.
•Freerun mode
In freerun mode, the camera is internally busy with capturing the next image while new parameters are transmitted to the camera. Depending on the exact time of transmission, new parameters might only come into effect two or even three images later.
•Trigger mode
In this mode, the camera reverts to idle state between two images. When you change the camera parameters, the new settings will be applied immediately to the next image.
Note that for some camera models the changes affect the image after the next image which is caused by the sensor, see Camera and sensor data.