Night vision goggles enhance night-time vision. If you are hunting, camping or boating in dark, or if your activity requires you to see during night, then you could use a night vision goggle. Night vision goggles are usually available as handheld devices or as those that you can wear on the head. The head-type goggles enable hands-free operation, which is particularly useful if you require night-time viewing for long periods. It is important that you analyze how and where you would be using the goggle. What works in a housing complex will not work for an area with low-light conditions. Also, analyze your image clarity needs. Is it enough if you know that something is moving out there in the dark or you want to know what it is?
Instructions
1. Compare range of goggles. A goggle's ability to provide a clear image from a distance depends on the goggle's capability to magnify the subject's image, the goggle's resolution and surrounding lighting conditions. A long lens increases magnification but does not transfer light effectively. Research a goggle that has high-speed lens with low magnification. This specification will enable the goggle to capture more light in darker conditions and increase the goggle's range capabilities. Most users find a magnification of 1 times to 3 tims the original image size satisfactory.
2. Compare tube gain. Tube gain is the number of times by which a goggle can amplify light input. A goggle requires higher gain in low-light conditions to create a clear image of the subject. You will require higher gain if you are using a longer lens for viewing very distant objects because longer lenses do not transfer light as effectively as shorter lens. Higher gain can increase image clarity and improve your viewing range, but not always. If you are using the goggles in places such as housing complexes, apartment lights and street lights can reduce clarity.
3. Compare resolution. With higher resolution goggles, you will be able to view details clearly instead of just seeing them as shapes or blurred images. A good quality goggle produces a green monochrome image that is clear in the center and blurred at the edges. Since the human eye recognizes contrasts in green easier than other colors, the image quality is better.
4. Compare size and battery availability. If you will be using your goggles for long periods, consider a lightweight model. If you will be carrying it to places where electricity is not available, consider models that come with batteries.
Tags: clear image, image clarity, light effectively, long periods, low-light conditions, Night vision