A fixed iris is a part of widely used fixed iris lenses that are inexpensive and are found in smaller types of fixed CCTV security cameras, usually small case or dome cameras. A fixed iris can not be adjusted for light conditions. Therefore you must make sure the lighting is optimal at all times in order to get acceptable video images from a camera with this type of iris. Many fixed focal length lenses use this type of of iris. However, there are many that will still have an auto iris or electronic shutter feature.Get Free Video Surveillance Systems Quotes!
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