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On Screen Troubleshooting: Difference between revisions
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→Contrast Degradation
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Signs of contrast degradation are a washed out image with pale colors and milky blacks. | Signs of contrast degradation are a washed out image with pale colors and milky blacks. | ||
Degraded contrast can be caused by dirty projection ports or lenses; reflected light from walls, floors, or ceilings making its way back to the screen; ambient light from exit signs or aisle lights; reflected light from within the projection mechanism (for example a damaged shutter with a flaking non reflective coating); poor shutter alignment; or poor lamphouse alignment. | Degraded contrast can be caused by dirty projection ports or lenses; reflected light from walls, floors, or ceilings making its way back to the screen; ambient light from exit signs or aisle lights; reflected light from within the projection mechanism (for example a damaged shutter with a flaking non reflective coating); poor shutter alignment; or poor lamphouse alignment. | ||
An individual print may have low contrast if it is intended for TV broadcast or transfer to video, is from poor source material (e.g. a 16mm dupe print), or was misprinted by the lab. In this case there is nothing much to be done. | |||
=Focus= | =Focus= | ||