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8x40 binoculars nowhere near 8x



(except air quality and Medical Science

Comments
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https://www.harrisoncameras.co.uk/blog/guides/binoculars-buying-guide-choose-the-right-binoculars-for-your-activity_blog-bino - "
An 8X40 pair has an 8x magnification; a 10X40 pair has a 10x magnification and so on.
Magnification refers to how much bigger the image will appear compared to the naked eye.
If you're looking at a subject with a 10X40 pair of binoculars, then the subject will appear 10 times bigger than if you were looking at it with the naked eye.
It is always tempting to get the highest magnification in binoculars, because logically, you would think that the more magnification you have the better the image.
Well according to science and possibly a very, very long formula, the more magnification you have, the less light reaches the eye.
So in the day to day world of binoculars, 20x binoculars, may sound fantastic, but unless the objective lens is really big, the image will be less clear than if you have a 10x42 pair."
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Thanks,but the problem is they say 8x40 on them, but if I look at a distant object with one eye through the binocular, and one eye without, the image only appears to be about 3 times larger.They aren't zoom ones turned down either.EDIT:I found another pair with "Made in Japan" stamped on. these do make the image about 8x bigger, so the batteries must have gone in the first pairI want to go back to The Olden Days, when every single thing that I can think of was better.....
(except air quality and Medical Science)
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Why do you need Binoculars to test signal strength? A compass yes so you can check a Satelite dish alignment I can understandDon't think ther Binoculars are strong enough for you to see tha Satelite from your house - think the clouds will get in the way and the way those things wizz around and the number of them it will be hard to identify the correct one or read the model numbers - the writing is quite small.0
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Grey_Critic said:Why do you need Binoculars to test signal strength? A compass yes so you can check a Satelite dish alignment I can understandDon't think ther Binoculars are strong enough for you to see tha Satelite from your house - think the clouds will get in the way and the way those things wizz around and the number of them it will be hard to identify the correct one or read the model numbers - the writing is quite small.
I can see the TV screen from up the ladder, I can just read the on-screen signal information with my 8 3x40 binoculars
I want to go back to The Olden Days, when every single thing that I can think of was better.....
(except air quality and Medical Science)
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Batteries in binoculars ? are you sure you don't mean your hearing aidsEDIT: Perhaps you may be better using your smart phone camera and zoom4.8kWp 12x400W Longhi 9.6 kWh battery Giv-hy 5.0 Inverter, WSW facing Essex . Aint no sunshine ☀️ Octopus gas fixed dec 24 @ 5.74 tracker again+ Octopus Intelligent Flux leccy1
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What does 8 times bigger mean? 8 times bigger in each dimension?No reliance should be placed on the above! Absolutely none, do you hear?0
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GDB2222 said:What does 8 times bigger mean? 8 times bigger in each dimension?They (should) make objects appear 1/8 of the distance away (8 times closer), so 8x bigger vertically & horizontally.Looking at a distant house with one eye through the binoculars and the other eye not, with my Japanese ones the image is about 8x taller than real life, but only about 3x taller with the first pair of no brand made nowhere ones.I posted in case I was misunderstanding something about how I was measuring the magnification, turns out I wasn't and the first pair are more like 3x40. I bet they have mirrors inside not prisms as well!I want to go back to The Olden Days, when every single thing that I can think of was better.....
(except air quality and Medical Science)
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Are you reading a 3 as an 8?
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GDB2222 said:What does 8 times bigger mean? 8 times bigger in each dimension?Retired at age 56 after having "light bulb moment" due to reading MSE and its forums. Have been converted to the "budget to zero" concept and use YNAB for all monthly budgeting and long term goals.1
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With binoculars/optics the magnification level refers to linear dimensions, not size of area.
So, as above, 8x should make the object 8x as high and 8x as wide (as if the object were 1/8th the distance away).
This is how the the Made in Japan binoculars behave.
What the general public understand as 8x bigger is not what matters, as the terms for binoculars have specific definitions.
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