This camera is quite rare as it is one of the earliest special effects cameras. The camera cranks backwards as well. This means that you can fade out on one scene and then cap the lens and crank back to where you started your fade, go to your new scene and fade up with an overlapping dissolve. The fader is adjustable. You can make your fade in two and a half, five or ten feet of film. See the picture of the gear with these markings on it. I have never seen a camera earlier than this that did this type of in camera effect. It seems simple to us now but this was a very professional thing to do and was quite a major innovative special effect for cameras around 1910.