I have the asi 178mc-cool what I do to take long exposure pic it seems to do only video in firecapture. who can help me? please
Try this : http://astrolive.io/astroliveusb.html
There is a free version for ZWO camera.
Rodolphe
In firecap you can select the output file type. in the same box with the start button there is a box that indicates the current output, in this case AVI. select that box and change to the output you desire.
David