Someday, I'm going to make a camera with a lens, a shutter, and variable f-stops. Probably the hardest part is the shutter. This is the mechanism for a shutter on an Ansco Shur Shot Jr. I recorded the video at 60 fps and was able to time the shutter using the Photoshop animation timeline. It's a pretty accurate 1/30th of a second (the lens was visible for two frames, each lasting 1/60th of a second).