User's Guide
Replace
th
e two allen screws
to
fasten the control unit; a third
screw
of
the sarne size should be screwed into the upper right
side
of
the unit from the opposite direction.
The control unit can remain permanently attached to the
XTRpLus
without adding discernable bulk or weight. Simply
keep the unit turned off and the bearnsplitter retracted (see
below) when video assist is not needed.
14
.2 The Internai Beamsplitter
The Aaton CCD assist system employs
an
internal, user-
retractable beamsplitter that
reroUles a portion
of
the viewfinder's
light path to the CCD target while the video assist is in use.
ln
situations which
do
not require the CCD assist, the bearnsplitter
is designed to be retracted to
allow 100%
of
the viewfinder's light
to reach the eyepiece.
From body
# 1928 and on, the beamsplitter delivered
as
standard
from the factory has a 75/25 reflection ratio. This means that
25%
of
the light from the viewfinder is sent to the CCD target
when the beamsplitter is
in
place. This 75/25 ratio is ideal for
use with Aaton's VR42 black and white CCD. Although not visi-
ble from the outside
of
the body, the 75/25 beamsplitter is identi-
fied
by
its blue anodized holder.
Aiso available'is a
50/50 beamsplitter, which sends a greater per-
centage
of
light to the CCD target. This bearnsplitter is recom-
mended for use with the VR46 col or CCD and is distinguished
by
its black holder.
The Camera Body
37