Optical Configuration - Martin MAC 250 ENTOUR User Manual

O
PTICAL CONFIGURATION
G O B O O R I E N T A T I O N
The orientations shown in Figure 3 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.
More reflective side towards lamp
To minimize the risk of gobo overheating
and damage, the more reflective side of a
coated gobo must normally face towards the
lamp.
Focus is easiest to maintain if you install all gobos in the same plane of focus. This means
that on one gobo wheel, coated sides should all face the same way. However, because of
the risk of heat damage, the first priority is normally to ensure that more reflective sides all
face towards 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. The edge of the gobo can also be
seen when looking through the glass
Smooth side towards lamp
To avoid heat problems, certain colored textured glass gobos are best installed with the
colored/textured side towards the lamp. If in doubt, consult your Martin dealer or gobo
supplier.
Reflective side towards lamp
Reversed image towards lamp
Coated Glass Gobos
Less reflective side away from lamp
The less reflective side of a coated gobo will
absorb more heat, and must therefore
normally face away from the lamp.
Textured Glass Gobos
Metal Gobos
Image / text Gobos
a b c
Figure 3. Correct gobo orientation

Optical configuration

Uncoated side Coated side
Textured side away from lamp
Black side away from lamp
True image away from lamp
abc
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