Nikon ECLIPSE E400 POL Instructions Manual page 32

1 Eyepiece Tube
Completely loosen the eyepiece tube clamp screw on the intermediate tube
with the
hexagonal screwdriver. Fit the circular dovetail of the eyepiece tube into
the circular
dovetail groove of the intermediate tube by tilting it at an angle.
When fitting, insert the
2 Eyepieces
32