A simple application used to take pictures and save them in the folder you say starting from the DCIM / sister / root.
As you creating folders, you can go recovering them from the list to go faster.
One screen and android native camera.
Why Camera Sister because it is an app at the request of my sister. ;-)
The first time it runs it asks the name of the folder, but put no is stored in the root discussed. These times the app is launched, the camera jumps directly back button closes the camera and leave the folder selection screen.