Nikon Autofocus Speedlight SB-22 Instruction Manual page 8

Wide-flash adapter
Covers the picture angle of lenses
28 mm or longer. Slides out and covers
the flash head (see page 36).
Aperture selectlon/shooting
distance range panel
See pages 17 to 31.
Before using the SB-22,
peel off the protective
paper covering the panel.