Is the Zoom Mode set to Enlarge?

Press the Mode button. 　

Normal, Enlarge, Reduce, Normal...

The Mode button may be pressed to enlarge or reduce the size of the image on the Head Display.

The following Zoom modes are available:

• Normal - the image is displayed at the original resolution
• Enlarge - the center portion of the image is enlarged to fit the Head Display screen;
  this mode is useful for focusing or to check fine details in the image
• Reduce - the image is reduced in size to fit the Head Display screen;
  this mode is useful if you cannot clearly see details around the edges of the image in Normal mode

Pressing the Mode button will change the Zoom mode in the following order: Normal, Enlarge, Reduce, Normal...