AAton XTRprod User's Guide download pdf (Page 45)

2.12.1 Installing the Control Unit

Both the VR42 and VR46 CCD control units can be easily attached

onto the XTRprod in a few seconds without the need for

adjustment.

Remove the two allen screws located on the PBX immediately below

the Lemo14 connector. Mate the Amph9 and Lemo14 connectors

of the control unit to those connectors on the body and plug in the

unit.

Replace the two allen screws to fasten the control unit; a third screw

of the same 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 XTRprod

without adding discernable bulk or weight. Simply keep the unit

turned off and the beamsplitter retracted (see below) when video

assist is not needed.

2.12.2 The Internal Beamsplitter

The Aaton CCD assist system employs an internal, user-retractable

beamsplitter that reroutes a portion of the viewﬁnder's light path to

the CCD target while the video assist is in use. In situations which

do not require the CCD assist, the beamsplitter 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 visible from the

outside of the body, the 75/25 beamsplitter is identiﬁed by its blue

anodized holder.

Also available is a 50/50 beamsplitter, which sends a greater

percentage of light to the CCD target. This beamsplitter is

recommended for use with the VR46 color CCD and is

distinguished by its black holder.

THE CAMERA BODY

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AAton XTRprod User's Guide Page 45