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    How a night vision goggles can be focused?

    • Author:Durham Technology
    • Release on :2018-12-18

    A regular scope has an objectivelens and eyepiece adjustment. First, adjust the objective lens to perfect theimage. Then adjust the eyepiece to your eyesight. In binoculars or goggles eacheyepiece must be adjusted separately. To do this close your left eye and adjustthe right eyepiece. Then open you left eye and adjust the left eyepiece to geta full contrast image. Some night vision goggles require objective focusingfirst, and then adjusting the eyepieces.


    There are many different variables thatcan effect the distance that you can see with a Night Vision device. The largerthe object the easier it is too see. If you're trying to see details we callthis recognition range and if you're just trying to see whether something thereis or maybe you will just see movement but won't be able to 100% determine whoor what it is. This is called detection range. Another variable is lightingconditions. The more ambient light you have (starlight, moonlight, infraredlight) the better and further you will be able to see. You can always seefurther on a night where the moon and stars are out then if it is cloudy andovercast. We typically state that you can tell the difference between a maleand a female or a dog and a deer at about 75 to 100 yards. However, if you werelooking across an open field and there was a half moon out you could see a barnor a house 500 yards away.