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Focus and zoom
The focus lens focuses the beam from approximately 2 meters (6.5 feet) to infinity.
The separate zoom lens varies the focused beam angle from approximately 11.5° to 55° with the standard
lens installed.
Zoom/focus linking
Focus can be linked to zoom so that it automatically adjusts to match changes in zoom angle. Focus on
rotating gobos matches zoom closely, while focus on the gobo animation wheel matches zoom best in the
center of the zoom range and slightly less precisely at the two extremes of the zoom range.
Linked zoom/focus works within 3 distance ranges:
• Near (5 - 10 meters)
• Medium (10 - 20 meters)
• Far (20 meters - infinity)
To link zoom and focus, select a distance range using the Fixture Control/Settings DMX channel or FOCUS
TRACKING in the PERSONALITY menu in the control panel. Then adjust focus to obtain the required
degree of sharpness. Linking is now enabled and focus will auto-adjust.
Pan and tilt
16-bit pan and tilt control is available on channels 17 plus 18 (pan) and 19 plus 20 (tilt).
Maximum and minimum pan and tilt limits can be set using the control panel (see "Personality – tailoring
performance" on page 17) and via DMX.
Followspot mode
The MAC III AirFX features a followspot mode in which the fixture ignores any pan, tilt, or pan and tilt
commands sent via DMX or the control menu, releasing the head for use as a followspot.
In followspot mode, the pan and/or tilt motors can be engaged or disengaged using commands in the
control menu. If motors are engaged, they act as a brake to pan, tilt, or both pan and tilt movement to
prevent the head from moving when it is not being held in place, but DMX or menu-based control over pan
and tilt is still disabled (see "Personality – tailoring performance" on page 17 and "Control panel menus" on
page 48).
Followspot handles can be custom-made by the user to suit the user's own preferences and requirements.
Followspot handles safety precautions
Warning! It is the user's responsibility to ensure that the followspot handles and any mounting
brackets are safe and that the fixture is kept in followspot mode at all times while handles are
installed to avoid collision between the followspot handles and the yoke.
Warning! Intermediate brackets for permanent mounting on the back of the MAC III AirFX head must
be constructed so that they will not touch the yoke at any point in the head's tilt range!
Warning! Screws used to fasten any item to the rear of the head may only be fastened into the holes
(arrowed in Figure 15) provided in the rear head cover. Do not attempt to fasten any item to the rear
of the head by any other method. Screws must not protrude more than 15 mm (0.6 inches) into the
rear head cover, or there is a danger that they may damage electrical insulation inside the head and
create a risk of serious or lethal electric shock for the operator.
Warning! Followspot handles must be thermally insulated so that it is impossible for the operator to
suffer discomfort or a burn injury.
Followspot handles use and construction
The MAC III AirFX's rear head cover is a magnesium alloy casting. Magnesium alloy is prone to galvanic
corrosion when steel screws are fastened into it and has a relatively low resistance to mechanical wear on
threads. Self-tapping screws fastened into magnesium alloy should be left there permanently.
Effects
25
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