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Discussion Starter #1
I have spent about a week now looking at the information (propaganda) put out in catalogs, websites, etc by the major scope manufacturers and I must conclude that they ( the manufacturers) are convinced we are terminally stupid!
Maybe we are. We continue to buy their products based on buzzwords and BS such as “bright”, “clearest”, “exceptional”,etc. in lieu of any specification remotely approaching the subject of
“Light Transmission Percentage”!!!!!
Of course they’re not guilty of “misleading” advertisement, that would mean they made a misstatement. What they are guilty of is subterfuge etc, and OMISSION !!!
Try as I might I only found two (2), mentions of Light Transmission Percentage in my search.
Boys and girls this is NOT rocket science!!! Even in WW II, a good “sniper scope” would have a rating of at least ninety (90)!!
Are their products SO BAD, they don’t even want to broach the subject? I believe so.
If you know of a scope that has a Light Transmission Percentage value stated in their specifications let me know.
In the meantime CAVEAT EMPTOR!!!!!!
 

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Discussion Starter #3
thanks..

will add these to my reading list..interesting blurb from ZEISS..


T

Transmission
This is the amount of light in % which can pass through an optical system. Here, it is not only important that it is as high as possible - 90% is standard in binoculars and riflescopes from Carl Zeiss - its maximum must also lie in the right spectral range, an important factor in binoculars to be used in low light conditions. As the sensitivity to blue of the human eye increases in twilight, an image with a yellow or pink tinge in daylight indicates a low transmission in the blue spectral range and hence poor detail recognition in low light conditions.

Twilight factor/Twilight performance
The twilight factor makes it possible to compare the performance of binoculars in low -light conditions. It is calculated by first multiplying the magnification by the objective lens diameter and then finding the square root of the result. In a 7x42 binocular, the twilight factor is therefore 17.2 - the minimum for sufficient detail recognition in twilight - and an 8x56 binocular has a twilight factor of 21.2. A comparison: An 8x30 binocular, on the other hand, has a twilight factor of 15.5 and is therefore less suitable for viewing in very low light conditions.
Note: The twilight factor is only one parameter among many, it does not say anything about the image quality which is a determining factor in detail recognition in twilight (twilight performance)! Twilight performance is mainly determined by as high a transmission as possible in the right spectral range, as low a straylight portion as possible, as high contrast as possible and as high a resolution as possible. Only if all these requirements are met at the same time - and only then - can the twilight factor be used a measure of the twilight performance in binocular viewing.
 

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ryback770, I think everyone that is in the market to sell a product, is going to talk up there product. Not just in scopes, but everything. It is up to you to make an informed decision on what fits your needs. No one is making anyone buy there product. And I don't believe they think we are studied, they just want to give us information, and it is up to us how we use it. :D
 

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Price is also a good indicator of the light transmission that you will get in a scope you purchase...
 

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Discussion Starter #6
BUCK TRUCKER RESPONSE..

response...
"Burris(95%), Bushnell(95%), Nikon Monarch Gold (95%), Zeiss (markedly above 90%).

Took me about 5 minutes to find 4 thanks to www.theopticzone.net"

Well maybe these 66 yr old eyes just can't read right on a monitor screen, but I can't seem to find those % you quoted on.. (you meant www.theopticzone.com right?) opticzone.
Thanks anyway..........
 

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Re: BUCK TRUCKER RESPONSE..

ryback770 said:
response...
"Burris(95%), Bushnell(95%), Nikon Monarch Gold (95%), Zeiss (markedly above 90%).

Took me about 5 minutes to find 4 thanks to www.theopticzone.net"

Well maybe these 66 yr old eyes just can't read right on a monitor screen, but I can't seem to find those % you quoted on.. (you meant www.theopticzone.com right?) opticzone.
Thanks anyway..........
Yep Ryback770,

I did mean www.opticzone.com, sorry. Here's the exact verbage from their website on the Nikon Monarch Gold 2.5-10X50.

Category: Scopes

Description: This award winning combination found favor with many of American's top gun and hunting editors, and for good reason. Its represents the ultimate balcance of magnification and brightness. The Monarch Gold 2.5-10x50 is ideal for any hunt, from close cover to open shots on the plains or prairies. Locking side focus parallax adjustment for added precission and resolution for the longest shots. Ultra ClearCoat System for 95% light transmission, Rugged, one piece 30mm main body tube , 100% Waterproof/Fogproof/Shockproof, Quick Focus Eyepiece, Locking side focus parallax adjustment, 1/4-minute click handturn reticle adjustments, Lifetime Full Warranty

Now I'm not sure every description on every one of these scope lines mentions the LT % but the 4 I referenced in the earlier post did when I checked.

66 yo eyes aren't a problem, my wife says I have "teenager eyes" when looking for something. Apparently I can't find something when it's right in front of me sometimes! :-D
 
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