Use this dialog box to make additional settings that effect your camera's exposure. Here, you set, for example, the maximum possible exposure times for the image acquisition. This will enable you to prevent the exposure times from becoming unnecessarily long.
Opening the dialog box
You can open this dialog box, for example via the camera control. In the Camera Control tool window's toolbar, click the Acquisition Settings button. Select the Camera > Exposure entry in the tree view.
Description of the function groups
See also
Maximum exposure time
You can set the maximum possible exposure time for the live-image and for the snapshot. To do this, use the slide controls. Alternatively, you can also enter the value you want directly in the text field. The maximum value that you can enter here depends on the camera you use.
The Manual and Automatic slide controls apply in this respect to the two possible modi for determining the exposure time, the automatic, respectively the manual mode. You determine which mode you want to use in the Camera Control tool window.
Automatic exposure time correction
If your images aren't optimally exposed at the automatic exposure time, if they are too dark or too bright, use the automatic exposure time correction.
Should your images be overexposed or appear to be too bright when you use the automatic exposure time, select a value from the list that is smaller than 100%.
Should your images be underexposed or appear to be too dark when you use the automatic exposure time, select a value from the list that is larger than 100%.
Test the effect of the exposure time correction in the live-image. Should you not want a correction of the automatic exposure time, select the value 100%.
Fast Live
In the live-image, a high frame rate is required for focusing the sample and for searching for a position on the sample. The fast live mode enables a fast live-image automatically by limiting the exposure time in the live-image to a preset maximum.
Using fast live mode can increase image noise. The image noise can be reduced by increasing the maximum exposure time in the Exposure limit field.
In automatic exposure time mode, the Camera Control tool window displays the exposure time for the image that will provide optimal quality for that image. If the live-image has a different resolution from the snapshot, this is automatically taken into account when computing the optimal exposure time.
As soon as you acquire an image, with the Acquire > Snap command for example, the exposure time displayed in the Camera Control tool window is used for the acquisition.
In live mode, the histogram in the Adjust Display tool window displays the histogram of the resulting snapshot that was computed by the software. After the acquisition of the snapshot, the snapshot's actual histogram is displayed.
Turning on fast live mode
You can turn the fast live mode on and off independently for the manual and automatic exposure time modes. You can specify the exposure time mode in the Camera Control tool window. There you can select either the Manual option or the Automatic option in the Exposure group.
Select the Activate for manual exposure check box to use the fast live mode in manual exposure time mode.
Select the Activate for automatic exposure check box to use the fast live mode in automatic exposure time mode.
Clear a check box to turn off the fast live mode for the corresponding exposure time mode.
Normally the fast live mode is only turned on for the automatic exposure time mode.
Switching on the manual exposure time
Enter the maximum exposure time possible in the fast live mode in the Exposure limit field. You can also use the slide control to set the exposure time.
The shorter the selected exposure time is, the more image noise there will be in the live-image.
Please note that in the fast live mode, the exposure time given for the live-image in the Properties tool window isn't the camera's actual exposure time. For this reason, the value displayed in the tool window can be bigger than the exposure time that was entered.
3039 20032014