Martin Imager Series, Operator'S Manual

Page: 44 / 84

44 Gobos
Gobos
The:
• Imager DMX Gobo Wheel accepts up to four metal or glass gobos
• Imager DMX Gobo accepts a single metal or glass gobo
The gobos must be size D with an outside diameter of 53.3 mm 2.10 in.) and
a maximum image diameter of 40 mm (1.57 in.).
The images can be rotated in both directions or set in an indexed position.
A single Imager promotion gobo is factory installed.
Image projection size
To calculate the size of a projected image using a gobo of a given size, the
formula is
To calculate the gobo image size required to achieve a projected image
size, the formula is
The focal length of the Imager will be one of the following:
• 150 mm (5.9 in.) for the optional 15° lens
• 100 mm (3.9 in.) for the standard 23° lens
• 70 mm (2.75 in.) for the optional 32° lens
Custom gobos
For optimum performance, custom glass gobos for the Imager should be
made with the text, logo, and similar artwork reversed on the coated side
(unless the moving mirror accessory is fitted as this will invert the gobo
image that is projected).
projected image size
gobo image size projected distance
×
focal length
---------------------------------------------------------------------------------------- =
gobo image size
projected size focal length
×
projected distance
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