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#11869014 - 03/02/17 MARCH: Ask John Barsness Questions About "BINOCULAR BASICS, PART ONE: MANUFACTURING"
RickBin Offline


Campfire Outfitter

Registered: 06/10/00
Posts: 9558
Loc: Los Angeles, California
Hi Guys:

I am pleased to direct you to the new article on the Home Page, "BINOCULAR BASICS, PART ONE: MANUFACTURING" by John Barsness (Mule Deer).

Please use this thread to ask questions about the article, and I look forward to the next installment.

Thanks, John!
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Rick Bin
24hourcampfire.com

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#11883585 - 03/08/17 Re: MARCH: Ask John Barsness Questions About "BINOCULAR BASICS, PART ONE: MANUFACTURING" [Re: RickBin]
gundog Offline
Campfire Regular

Registered: 01/29/01
Posts: 446
Loc: Eastern Nebraska
John,

I really enjoyed this article. Have you ever had someone "not" agree that a particular set of binos were really good? That they thought what you believed to be a lesser set were better than one you thought was really good?

I have a 2nd job at an outdoor retailer in the optics dept. One thing I have noticed over the years is that not everyone "sees" the same details with binoculars.

Many customers that come in looking at binoculars cannot see the optical differences in high end glass and mid-range glass. Some have stated that they see no difference between a $300 set of Nikons or Leupolds, and a set of Swarovski SLC's (?). This has happened too many times over the years to be a fluke to me.

On the other hand, when young military pilots come in and compare binoculars they immediately see details in the glass that most do not. I am convinced that if one has excellent eyesight to begin with - they have a different viewing experience than the average person with average to poor eyesight, despite the fact that one can focus binoculars to obtain a clear sight picture.

I always encourage to try as many different brands as you can, because we all see things a bit differently. What may be clear and bright to me may not give you the same experience.

Just curious if you have noticed the same thing?

Mark

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#11884138 - 03/08/17 Re: MARCH: Ask John Barsness Questions About "BINOCULAR BASICS, PART ONE: MANUFACTURING" [Re: gundog]
Mule Deer Online   content
Campfire Oracle

Registered: 07/24/01
Posts: 41506
Loc: Banana Belt, Montana
Oh, yeah, eyesight makes a big difference!

One of the things that happens as we get older is the pupils of our eyes don't open up as much in dim light. As a result, the advantage of larger exit pupils in binoculars is reduced, especially in dim light, because smaller eye-pupils can't take advantage of the "extra" light.

That's is pretty well-known, but another aspect of smaller eye-pupils is they tend to sharpen the view slightly, especially around the edges of the field of view--exactly like a smaller lens aperture in a camera sharpens the edges, and for the same reason: It reduces the amount of "edge" light, the rays that come in through the edges of the lens, which are deflected the most, both due to their distance from the center of the lens, and the interference of the lens mount.

However, this doesn't help the overall sharpness of older eyes. Instead it just reduces the difference in the perception of sharpness through optics.

Eyes also vary considerably in how they perceive color. One result is a lens system that emphasizes one color over another may look sharper to one person, and not to another.

There are other differences as well, the reason I try to gather several people now and then to look through a bunch of binoculars. It's always good to get a broader spectrum of opinions.
_________________________
John

"Gunwriters, as you know, aren't as informed as their readers are and if it wasn't for the readers, there would be no need for writers..."--Shrapnel, May 2015

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#11942095 - 04/01/17 Re: MARCH: Ask John Barsness Questions About "BINOCULAR BASICS, PART ONE: MANUFACTURING" [Re: RickBin]
RSY Offline
Campfire Regular

Registered: 10/13/03
Posts: 1081
Loc: Central Texas
I recently bought a Leupold BX-1 McKenzie binocular. Seem like a nicely made unit, but they're not quite as sharp as I expected.

I know they're the bottom of the Leupold line, but it seems like my 20+ year-old porro prism Minolta mini's are significantly crisper.

Do these BX-1s have adequate correction coatings?

Scott

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#11942197 - 04/01/17 Re: MARCH: Ask John Barsness Questions About "BINOCULAR BASICS, PART ONE: MANUFACTURING" [Re: RSY]
Mule Deer Online   content
Campfire Oracle

Registered: 07/24/01
Posts: 41506
Loc: Banana Belt, Montana
Apparently not.
_________________________
John

"Gunwriters, as you know, aren't as informed as their readers are and if it wasn't for the readers, there would be no need for writers..."--Shrapnel, May 2015

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