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Metal gobos advantages
Are very popular used most commonly in india and affordable.
Rigid,suitable for text,Words and simple artwork projection.
Disadvantage - Can not accommdate more content, difficult to make an exact replica ,logos often gets modified, fine details and
lines are lost.
any content which has images or floting content can not be made. Colors not possible in Gobos itself, not fit for Sharpy / high beam lights
Glass Gobos
Advantages -- Good resolution, suitable for Logos, and Images . Projecting color, gradients and more complex designs
can accomodate more contents and fine lines . Can be used for High power lights,and sharpy , Colour in Gobos are possible .
Disadvantages-- Fragile,need better handling,more expensive than metal.
Gobo projections may get affected by many factors viz.
1.The temperature and intensity of the surrounding lights.
2.Environmental lighting
3.Surface property & colour that the image is being projected upon
4.Angle,distance of light from the surface.
How big will the image be?
Image size is dependant on number of things. None of which has much to do with the gobo itself.
It has to do with the beam spread of the lighting fixture you are using and how far away you are from the projection surface.
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