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1.7
Lenses
1.7.1 Primary Lenses
A primary lens inserts into the lens mount and is secured with a simple locking lever. It is important to
remember that a primary lens seals the projector. If the lens is missing when power is supplied to the unit,
unfiltered air will be drawn in through the lens opening and into the front area of the projection head,
potentially depositing dust and dirt on components in the light engine and optics. The attachment of the three-
plate lens mount is offset by jack screws spaced as far apart as possible to provide solid leverage and accurate
adjustment of boresight. Good boresight ensures alignment of the primary lens to the light engine and prism.
Refer to the D4K35 User Manual (P/N: 020-100773-xx) for all other primary lens installation details, the
boresight adjustment procedure at the screen, and lens specifications.
1.7.2 Motorized Auxiliary Lens Mount (MALM)
The MALM assembly is an optional hardware component, which is used to switch from flat to "scope"
formats. This assembly is secured to the projector base and supports either a 1.25x anamorphic lens or a 1.26x
wide converter lens (WCL). The drive and control electronics package for this motorized lens mount
communicates with and is controlled by the projector over a 9-pin subminiature D cable that connects to the
User I/O panel.
1.7.3 Anamorphic Lens
The optional anamorphic lens (1.25x) can produce 2.39:1 "scope" images when used in combination with the
primary lens. It is secured into a separate lens mount located adjacent to the lens opening and swings into place
in front of the primary lens for scope images. To install the anamorphic lens mount and lens option, refer to the
instructions provided with the anamorphic lens mount kit. The anamorphic lens horizontally spreads the image
back into its wider 2.39:1 scope image and is typically used in side-masking applications and on larger screens.
When using an anamorphic lens the incoming data must be scaled up to a higher vertical resolution in order to
work correctly.
1.7.4 Wide Converter Lens
In some applications a wide converter lens (WCL) can be used to accommodate changes between flat and
"scope" displays. The wide converter lens "zooms" the image from flat to scope image formats. It magnifies a
scope-formatted 2.39:1 image so it fills the screen without the sue of an anamorphic lens.
D4K35 Service Manual
020-100817-01 Rev. 1 (04-2012)
Never apply power to the projector unless the primary lens is installed.
Section 1: Introduction
1-7
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