Channel Vision
Channel Vision
Night Vision Optics
Night vision devices (NVD’s) have advanced considerably in recent years and this sophisticated technology is now easily available for anybody interested in outdoor pursuits such as camping, fishing, hunting, astronomy or sailing. Night vision devices work by capturing existing ambient light through the front lens. This light, which is made up of photons goes into a photocathode tube that transforms the photons into electrons. The electrons are then thrown against a phosphorus screen that changes the amplified electrons back into visible light which can be seen through the eyepiece. This image will appear as a clear, green-hued re-creation of the originally observed scene.
The main difference between various night vision devices is which type of image intensifier tube is used. A Night Vision Device can be either a 1st, 2nd or 3rd generation:
Generation I A GEN 1 unit will amplify the existing light several thousand times to provide an image that is magnified and easily viewed by the night scope’s eyepiece (ocular). These units are the most reasonably priced night vision devices and so provide the greatest value to people seeking night vision capabilities.
Generation II GEN 2 devices use a micro-channel plate to achieve lower image distortion as well as higher light amplification characteristics. This extra process allows GEN 2 units to amplify the light many more times than their GEN 1 counterparts, creating a significantly brighter and sharper image.
Generation III These devices have gallium arsenide added to the intensifier tube and a special protective film on the micro-channel plate, which increases the life of the tube, thus providing the user with good to excellent low light performance. GEN 3 devices are military standard.
For more information and to view a comprehensive range of NVD’s, visit www.sherwoods-photographic.com, a family owned company who specialise in telescopes and binoculars.
About the Author
The Article is written by sherwoods-photo.com/ providing Night Vision and Telescopes Services. Visit http://www.sherwoods-photo.com/ for more information on sherwoods-photo.com/Products & Services___________________________Copyright information This article is free for reproduction but must be reproduced in its entirety, including live links & this copyright statement must be included. Visit sherwoods-photo.com/ for more services!
Night Vision Binoculars are for Devoted Railfans
What is it about the sound and sight of a train? It doesn’t matter what time of day or which season it is. If you are one of the thousands of railfanning enthusiasts around the world, you know the affect a moving train has on you. Sometimes it reminds you of old memories or maybe you are looking forward to creating new ones. Other times, just the anticipation is good enough.
Railfanning is a hobby that most people are not familiar with. However, there is an abundance of spectacular videos of trains rolling down the tracks in places all around the world. A video doesn’t take the place of actually being close to the tracks, but it could be the beginning of a new railfan. In fact, before making any assumptions about railfans, you need to hang out with one sometime. If you look, they’re not hard to find.
Around the globe people settle into their vehicle or favorite lawn chair and watch colorful engines and cars roll by and into the next chapter of history. Railfanning can take you to the south or plains of Nebraska and Wyoming, the Colorado Rockies or even speeding down a highway because you are chasing a steam train excursion across the American west.
The concept of railfanning is simple and requires very little or no equipment to get started. The basics usually include a digital camera, multi channel scanner with the railroad frequencies of the area inserted, and a good pair of binoculars. A favorite location is one that is secluded and away from any populated area. Some of the older fans who have been involved for many years still use film cameras such as a 35MM. A multi channel scanner quickly becomes a necessity for new railfans and many of these are now in the digital format. Some scanners have up to one thousand channels so the maximum effort can be received on the favorite frequency programmed. Finally, there are binoculars that are perfect for daylight, dusk or dawn. Night vision binoculars are available for the faithful watchers who wait in the dark for a train others don’t see, but only know it will eventually pass by.
It would be irresponsible to avoid mentioning safety. Always make sure you stay a safe distance away from the tracks. There is always the possibility something can go wrong due to weather changes, the tracks, brakes or human error. Initially, it is a good idea to go with an experienced railfan. What you learn could be invaluable and you will probably have a lot more fun.
In conclusion, railfanning requires only a few items and fits into any budget or schedule. However, the experiences and memories can be priceless. The devoted watchers are well prepared to spend a day or two out along the tracks and away from signals that indicate a train is approaching. Hopefully, the next time you don’t have anything planned, pack for a day and spend it along a ribbon of rails either close by or miles from home.
About the Author
The author is Peggy Johnson who has recently opened a new binoculars store. An affordable collection of quality binoculars has been carefully selected for your favorite activity or the perfect unique gift for someone else. Learn more about daytime, dawn to dusk and night vision binoculars by visiting http://yournightvisionbinoculars.com.
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Web-Ready 4-channel 500GB HDDVR Surveillance System with 4 Night Vision Gun Cameras $349.99 Enhance the security of your home or business with this digital video security system with four cameras. Mobile phone surveillance is available with the iPhone and other supported smart phones with Windows Mobile Pro or Symbian on 3G Networks. |
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Web-Ready 500GB HDDVR Surveillance System with Indoor/outdoor Night Vision Cameras $375.99 Enhance your security with this digital video security system with indoor and outdoor cameras. Mobile phone surveillance is available with the iPhone and other supported smart phones with Windows Mobile Pro or Symbian on 3G Networks. |
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8-channel H.264 DVR Surveillance System Kits with 8 Night Vision Cameras $608.99 Keep your property safe and secure with this 8-channel security system. The security system includes a built-in 500GB hard drive for storing video and eight night vision cameras. |
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8-channel H.264 DVR Surveillance 500GB Security System with 4 Night Vision Cameras $528.49 Keep your property safe and secure with this 8-channel security system. The security system includes a built-in 500GB hard drive for storing video and four night vision cameras. |
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John Butler ‘Sound and Vision’ 2-piece Canvas Art Set $193.99 Artist: John Butler Title: Sound and VisionProduct Type: 2-piece Canvas Art Set |