ARRI Tilt Focus, Instruction Manual

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ARRI Tilt Focus
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3. General Description
The ARRI Tilt Focus lenses can be tilted out of their
optical axis and turned. This is possible because the
lenses depict a larger image circle than is necessary
to cover the actual negative format.
The creative possibilities are considerably more
far-reaching than with focus and aperture stop
alone on conventional lenses.
Examples of use:
• Free displacement of a focal plane, i.e. focusing
on an object plane not parallel to the filmplane.
• Isolation of a particular part of an image through
a specifically set focal plane.
The ARRI Tilt Focus lenses are especially robust and
precise. An index scale simplifies exact reproduction
of the chosen settings. Focusing is carried out using
a normal lens ring into which both normal follow-
focus mechanisms and adjustment motors can be
inserted.
An important advantage of the ARRI Tilt Focus lenses
is the fact that the image centre hardly moves at all
while tilting the lens, considerably simplifying tilting
during a shot.
The easily readable aperture scale is calibrated in
T-stops, can be read sideways and is printed on
both sides of the lens. Unified design, the same
front diameter of 87 mm and the gearing of the
aperture ring offer further user comfort.