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Image intensifiers amplify the available light to achieve better vision. An objective lens focuses available light on the photocathode of an image intensifier. The light energy causes electrons to be released from the cathode which are accelerated by an electric field to increase their speed (energy level). These electrons enter holes in a microchannel plate and bounce off the internal specially-coated walls which generate more electrons as the electrons bounce through. This creates a denser "cloud" of electrons representing an intensified version of the original image. The final stage of the image intensifier involves electrons hitting a phosphor screen. The visual light shows the desired view to the user or to an attached photographic camera or video device. A green phosphor is used in these applications because the human eye can differentiate more shades of green than any other color, allowing for greater differentiation of objects in the picture. Read How Night Vision Works.
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Designed for use with high performance ENG Electronic News Gathering Cameras having 1/2" or 2/3" bayonet mounts. These AstroScope night vision modules deliver very high quality night-time video images for professional broadcasters. Mounted between the camera and the lens, the AstroScope Gen 3 module amplifies low-light scenes so they are easily viewed and recorded by the host camera. Also available for Sony 1/2" bayonet-mount cameras.
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Convert Your Canon DSLR Camera Into a High-Performance Night Vision System. Electrophysics AstroScope is an advanced night vision module that incorporates a state-of-the-art Gen 3 PRO image intensifier that transforms dark scenes (below 10-4 lux) into bright, high-resolution images. The AstroScope 9350EOS-3PRO is specifically designed for Canon EOS-type cameras and mounts between the camera body and Canon EOS lenses using the standard Canon bayonet. AstroScope incorporates a high quality optic designed specifically for today’s digital SLR cameras and delivers full frame images with little or no vignetting.