Take a message and indicate the camera model, thank you
The eyecup is mainly used to prevent light from entering the eyecup during long-time bulb exposure to take pictures; it can also prevent the eyecup from scratching when the camera is not used; and prevent debris from entering the viewfinder when the camera is stored.
How to use the blindfold?
Remove the rubber eyecup before use, and then insert the eyecup into the card slot outside the viewfinder.