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Question by Wiscbuckhunter. Uploaded on March 17, 2010
3x9 is the varible power of the scope, it can be set at three times magnification and up to 9 times magnification. The 40 is the size of the objective lens(larger forward facing lens) and stands for 40 mm (40 millimeter). Some scopes have different powers and objective lens sizes, 44 mm, 50 mm, 54 mm and 60 mm.
Good answer Cgull and A + 1 for you sir!!!
Cgull beat me to the punch. Good answer +1 for you.
3x9x40... This is a variable magnification scope. 3= lower magnification 9= highest magnification with various magnification between. The 40 is the size of the front objective in millimeters.
Cgull wins the race to the answer.. Well said sir..
shouldn't it read 3-9 x 40 ?
Cgull wins... a + for him
Another word about the magnification - it refers to angular magnification, so if the power ring is set at 3 and you are looking at an object that extends over a 1 degree angle, then the scope will magnify that object so that it extends over a 3 degree angle when you look at it through the scope.
Human vision is generally pretty sharp for that conical area that subtends a 6 degree angle, everything outside that 6 degree cone is in your peripheral vision.
Also a good thing to keep in mind is that the size of the objective lens. A larger lens will allow more light to be captured for a brighter picture. However, if you plan to use it in areas that are well illuminated the extra light can actually be a hinderance. I normally use 40mm sized scopes which is a fairly common size and on sunny days I sometimes have trouble focusing on my target due to the brightness.
steve182 is right. There is one hyphen and one x. In a 3-9x40, the 3-9 means 3 power to 9 power. That means your eyesight multiplied by the respective numbered setting. The number that comes after the x represents the millimeters across the objective (forward) lens. It never struck me until now, but I wonder: would far/near-sighted persons receive more/less benefit from a given magnification, or would one still battle his own eyesight? Deep thoughts.....
The 3 is the lowest amount of magnification possible and the 9 is the highest amount possible and the 40 is the diameter of the scope measured in millimeters
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