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8x vs 10x (I know, I know) |
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supertool73
Optics God Superstool Joined: January/03/2008 Status: Offline Points: 11814 |
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For steadying I like to have on a ball cap and I put two of my fingers on each side up over the bill of my cap. When doing that I have almost no shake. I can even hold 12x50s pretty steady that way.
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Lifetime warranty and excellent customer service don't mean a thing when your gun fails during a zombie attack.
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PhilR.
Optics Apprentice Joined: August/02/2008 Status: Offline Points: 162 |
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OP - you might research the term "twilight factor". If you do so, you will find that JGRaider is correct. Exit pupil is not the only thing that determines how much detail you can see. And yes, I have tried the same exact scenario you describe, and I can tell you that you will be better off with a 10x. And if brightness becomes an issue, you could always go with a 10x50, and be where you would have been with an 8x42. Actually, IMO any hunter that is worried about 10x brightness should be going with a 50mm anyway....... |
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koshkin
MODERATOR Dark Lord of Optics Joined: June/15/2004 Location: United States Status: Offline Points: 13182 |
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Twilight factor in this case is only applicable if you eye pupils do not dilate beyond 4mm or so. If they do, you can throw the whole twilight factor business out. ILya
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oldfortyfive
Optics Apprentice Joined: June/16/2015 Status: Offline Points: 76 |
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I've been doing that for years also. It works great.
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wesgar
Optics GrassHopper Joined: January/11/2009 Location: NC Status: Offline Points: 22 |
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Thank you all for your responses.
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Bird Watcher
Optics Master Joined: August/30/2006 Status: Offline Points: 1523 |
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"I learned about clarity while on an Antelope hunt in SD.
Looking at some large whitetails with my 10x50 Nikon binocular. The Nikon failed to allow me identify the rack on the whitetails. Where the tiny 7x20 lens in my Leica rangefinder the racks were clear and countable. Glass quality trumps everything else." Clean glass also has its virtues. Perhaps the Nikon lenses just needed to be cleaned up. |
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I prefer Porro prism binoculars especially those made in Japan. (i.e. Minox BD 10x44 BP) 8>)
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Bird Watcher
Optics Master Joined: August/30/2006 Status: Offline Points: 1523 |
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Here's some quotes, from "How to Choose Binoculars", by Alan R. Hale, 1991, regarding Twilight Factor: This formula (T.F.) takes magnification more into account than the Relative Brightness Index (R.B.I.) and is a better indicator of brightness. It has been proven that when observing low contrast subject matter during twilight (not in the dark) higher magnifications will increase contrast and more detail will be seen. The bold lettering was in his book. Stan |
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I prefer Porro prism binoculars especially those made in Japan. (i.e. Minox BD 10x44 BP) 8>)
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