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cervelo
Optics GrassHopper Joined: November/22/2011 Location: fl Status: Offline Points: 12 |
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Posted: November/25/2011 at 05:24 |
New guy here and need a bit of help understanding some #'s. There is a pair of binos I saw and on the focus adjustment dial it had some #'s on them--8.5 X42 ( i understand what those # are) then below that it had 7,6*( with the * actually being a degree symbol , just don't have a degree symbol on my key pad). What are those #'s and what do they mean??
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FrankD
Optics Journeyman Joined: November/11/2005 Location: United States Status: Offline Points: 686 |
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That is the field of view tranlated into degrees. One degree is 52.5 feet. So, 52.5 x 7.6 = 399 feet.
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Frank
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lucytuma
Optics Jedi Knight Joined: November/25/2007 Location: Wisconsin Status: Offline Points: 5389 |
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Good info Frank, I did not know that.
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"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not." - Thomas Jefferson
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cervelo
Optics GrassHopper Joined: November/22/2011 Location: fl Status: Offline Points: 12 |
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Thanks Frank!!!!!
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Happy!!!!!
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Steve16
Optics GrassHopper Joined: February/13/2007 Location: United States Status: Offline Points: 6 |
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That's at 1,000 yards distance ... for those who weren't thinking that already. |
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Steve
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Klamath
Optics Master Joined: May/20/2007 Location: United States Status: Offline Points: 1308 |
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If you want to go metric, there is 17.5 meters per degree of view @ 1,000 meters. In your example (I'm thinking Swarovski 8.5x42 EL's) the fov will be 133 m @ 1,000 m.
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Steve
"Everything that can be counted does not necessarily count; everything that counts cannot necessarily be counted". William Bruce Cameron |
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cervelo
Optics GrassHopper Joined: November/22/2011 Location: fl Status: Offline Points: 12 |
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Steve--That is the pair I saw them on.
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Happy!!!!!
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Urimaginaryfrnd
MODERATOR Resident Redneck Joined: June/20/2005 Location: Iowa Status: Offline Points: 14964 |
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Good job Frank.
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