To provide a viewfinder system which enables a photographer to quickly pose in an appropriate position.

A visual field frame 31 is previously set with an appropriate posing position which enables the photographer to carry out framing in an ideal state when the photographer holds a lens-fitted photographic film unit 10. The length of a strap 33 is so set as to make the distance between the photographer and the lens-fitted photographic film unit 10 appropriate when the photographer holds the lens-fitted photographic film unit 10 in so as not to slacken the strap 33. When taking an image by using a sporting viewfinder, the photographer puts the strap 33 on his or her neck and holds the lens-fitted photographic film unit 10 so as not to slacken the strap 33. As a result, the distance between the photographer and the lens-fitted photographic film unit 10 is made appropriate and therefore the photographer can quickly pose.