As I understand things, without the calibration there would be 18 images overlaid each other with some shift in between. Each mirror has quite some degree of fr

As I understand things, without the calibration there would be 18 images overlaid each other with some shift in between. Each mirror has quite some degree of freedom, so they have to be aligned to each other until you have one sharp picture. Right now you might see each star 18 times in the picture. Probably they have taken some test images to check the operation of the cameras, but thats about it until a good degree of alignment is achieved.