C-Munipack 1.2 / User's manual

Making master-flat frame

The master-flat frame is an image made of several flat images. The flat image is used in a process of CCD image calibration. To reduce a noise of a result, it is advisory to make a number of raw flat frames and combine them into one correction frame. The separate correction frame has to be used for each filter, if the color filters are used. Avoid eventual camera rotation on its mount.

Clear the table of source files. Click on the Files -> Clear files item in the main menu.

Add raw flat frames to a table using the Files -> Add folder item or the Files -> Add files item. See the chapter Redution of CCD frames for details. Always combine files of the same exposure duration only.

Make a copy source files. Click on the Files -> Fetch/convert files item in the main menu.

Click on the Files -> Master-flat frame item. A new dialog appears. In the dialog, specify whether all files shall be processed or only the selected ones. Confirm the dialog by the OK button. In the following dialog select a directory and enter the name of output file where a new master-flat frame shall be saved to. Press the Save button.

When a task is finished, a new preview window appers. A new master-flat frame is displayed in the window.