Optical configuration
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G O B O O R I E N T A T I O N I N T H E M A C 7 0 0 P R O F I L E
The orientations shown in Figure 10 are correct in most cases, but consult your Martin dealer or gobo
supplier if you are in any doubt about the orientation of a specific gobo type.
Coated Glass Gobos
Focus is easiest to maintain if all coated gobos in a fixture are installed with their coatings
as close as possible to the same plane of focus. The coated gobos in the MAC 700 Profile
are factory-installed in this position. However, if there is an unusually high risk of heat
damage on a custom coated gobo, the first priority is normally to ensure that more reflective
sides face towards the lamp. If in doubt, install coated gobos with the more reflective side
towards the lamp, or consult your Martin dealer or gobo supplier.
More reflective side towards lamp
To minimize the risk of gobo overheating
and damage, turn the more reflective side of
a coated gobo towards the lamp.
Less reflective side away from lamp
The less reflective side of a coated gobo will
absorb less heat if it faces away from the
lamp.
To determine which side of a gobo is coated,
hold an object up to it. On the uncoated side,
there is a space between the object and its
reflection and the edge of the gobo can be
seen when looking through the glass.
Textured Glass Gobos
Textured side towards lamp
Smooth side away from lamp
Textured glass gobos in the MAC 700 Profile sit most squarely in the gobo wheel with the
textured side towards the lamp. If in doubt, consult your Martin dealer or gobo supplier.
Metal Gobos
Reflective side towards lamp
Black side away from lamp
Image / text Gobos
True image towards lamp
Reversed image away from lamp
Figure 10. Correct gobo orientation
Uncoated side
Coated side
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