Pentax 67II - Manual (Page 24)

BASIC OPERATION [PREPARATION]
22
Remove the cover as illustrated.
Attaching the viewfinder
Place the viewfinder on the upper
part of the camera as illustrated
and press it down until it clicks
two times.
Detaching the viewfinder
Turn the viewfinder unlock button
in the direction of the arrow to
align the red dots on the camera.
● When the AE Pentaprism
Finder is not attached
properly, [PErr] may
appear on the LCD panel.