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AR15.COM
12/3/2005 11:41:25 AM EDT
What do the numbers on the binoculars mean?  For example 8X21.   Doesn't that mean 8X magnificiation and 21mm lens?  If so, why does it seem that every pair of binocs I look through seem like the are only 2 or 3 times magnification?  Something's wrong and I don't think it's my eyes!
12/3/2005 11:45:18 AM EDT
[#1]
Yes, 8 magnification with 21mm objective lens.

8 mag means "looks 8 times closer not 8 times larger".

Dave S
12/3/2005 12:13:15 PM EDT
[#2]
Well it looks like it's only two or three times closer than.

My point is (and I guess I'll put it in the form of a question then) do manufacturers fudge the numbers or outright lie?  I mean, are there any industry standards to which they must adhere with their claims of magnification, etc?
12/3/2005 12:18:38 PM EDT
[#3]
The second number is usually the amount of light that is let in.  
12/3/2005 12:34:31 PM EDT
[#4]

Great bino info here...

www.bigbinoculars.com/faq.htm

12/3/2005 12:46:01 PM EDT
[#5]
wisdom : www.holgermerlitz.de/wisdoms.html

His home page (link @ bottom of page) has some reviews of some of the better glass around.
12/3/2005 1:17:49 PM EDT
[#6]
What brand of Binoc are they?  Almost all do NOT fudge the number.  Trust me, if they say 8x, they really are 8x - it just may not seem that way at first to you.

Usually the larger the objective lens the more light they let it, but there comes a point of diminishing returns.

I have found in my tests and usage that the optimal binoc is 8x32 - very good overall magnification and light gathering under optimal conditions, plus they weigh a lot less than 10x42, etc.
12/3/2005 1:19:07 PM EDT
[#7]
Anyone got info/links/reviews on the Kelty 2650?
12/3/2005 4:02:13 PM EDT
[#8]

Quoted:
Anyone got info/links/reviews on the Kelty 2650?



WTF?  That's a Hydration/backpack.  This thread is about binoculars.
12/3/2005 4:05:07 PM EDT
[#9]
8x50 means 8 magnification or power, and 50 means a 50 milimeter diameter lens.
Thats it. Nothing else.
12/3/2005 4:06:33 PM EDT
[#10]

Quoted:
Anyone got info/links/reviews on the Kelty 2650?



12/3/2005 8:09:28 PM EDT
[#11]

Quoted:

Quoted:
Anyone got info/links/reviews on the Kelty 2650?



packy.dardan.com/walky/albums/album11/aag.jpg



Kifaru thread was other window

Kifaru thread was other window
12/3/2005 8:15:46 PM EDT
[#12]
I read an article in some outdoor magazine that the optimum for the human eye is at least a 1:5 magnification to lense size ratio.  8x42, 10x50 etc.