@jud1255 The second number (following the x) is the size of the front lens. That lens collects light and does not generally have much of an impact of field of view, unlike the first number which is the magnification. The lower the magnification, with wider field of view you have. 20x magnification generally has a wider field of view than 30x.
Excellent video. But why you guys don't make 100 magnification. and equal the number needed for the front lense . Actually the point is to see far. Doesn't? Not wide. Of course with quality. That means the front lenses. Yeah. Go higher in those numbers! Why only 8x.10x. 20x. .. why not 100. 300??1000!
@jud1255 You would likely need to use a spotting scope or similar instrument that would start at around 20x power. With that much magnification, be prepared to use a tripod for stabilization.
A 10x90x90mm would be a spotting scope or binocular that has a variable zoom magnification with a range between 10x zoom and 90x zoom, and has a 90mm objective lens(es).
Great video, but it is a more complicated than that - whilst a larger Aperture will produce a brighter image (assuming same magnification), it also depends on the amount of available light- in bright conditions, you may not perceive it as being any brighter than a smaller one - because your iris in you eye will be small and block out much of the light coming from the eyepiece for more details and for my complete guide please search for exit pupil on my site.
It means the zoom. Lets say a 10 x90 binocular is already 10 times closer. At 90° wide vew. 10×90×90 doubles up the widest but not the distance. If you want to see something like about 3 blocks from your house if you live in the city. You need a 12 or 15 (first numbers in binoculars) by whatever number wanted to see wide.
does it not make for wider viewing if going say from 20x 50 to 30 x 80 , does it mean that at 80mm i would still see the same width of view as the 50mm
You'd probably need a binocular with at least 15x magnification, if not 20x. The only problem with binoculars that have magnification that high is that they are hard to hold steady and really should be used with a tripod. In general I'd recommend a spotting scope if you think you might need magnification more than 12x.
I CANNOT FIND THE SIZE OF THE NIKON TRAVELITE 3 . WOULD LIKE TO BUY SOMETHING BETTER. BUT HOW CAN I FIND THE SIZE OF THE LENS SIZE. THERE ARE NO MARKINGS. LOVE YOUR VIDEOS. THANK YOU.
I'm glad you've liked our videos. All versions of the travelite binoculars have 25mm objective lenses. One way to greatly improve the performance would be to get a binocular with 42mm objective lenses which would give you a much brighter view.
Still watching it ... almost 15 years later ! Tks a lot for the info
I loved the bloopers. Seems like a fun crew.
@jud1255 The second number (following the x) is the size of the front lens. That lens collects light and does not generally have much of an impact of field of view, unlike the first number which is the magnification. The lower the magnification, with wider field of view you have. 20x magnification generally has a wider field of view than 30x.
Excellent video. But why you guys don't make 100 magnification. and equal the number needed for the front lense . Actually the point is to see far. Doesn't? Not wide. Of course with quality. That means the front lenses. Yeah. Go higher in those numbers! Why only 8x.10x. 20x. .. why not 100. 300??1000!
thanx eagle optics for the objective lens explanation, i war very much confused with it , now it is clear.
Your videos are amazing! Very clear and easy to understand. Showing us how would we see through the binos is a big difference! Thanks a lot.
+Adrian Boloveschi
I'm so glad you enjoyed it and found it helpful!
Thank you for the explanation of the Objective lens size. I'm looking at going on an Alaskan cruise and thinking an 8x32 would be about right for me.
Loved the bloopers at the end as well! Thanks for the great, informative video! :-)
We're so glad you enjoyed this video! Thank you for watching!
Nice video. Excellent information.
@jud1255 You would likely need to use a spotting scope or similar instrument that would start at around 20x power. With that much magnification, be prepared to use a tripod for stabilization.
Great explanation, thank you.
A 10x90x90mm would be a spotting scope or binocular that has a variable zoom magnification with a range between 10x zoom and 90x zoom, and has a 90mm objective lens(es).
Learned a thing or two... thanks!
thanks for simple explanation. Love Nina 2.
Great video, but it is a more complicated than that - whilst a larger Aperture will produce a brighter image (assuming same magnification), it also depends on the amount of available light- in bright conditions, you may not perceive it as being any brighter than a smaller one - because your iris in you eye will be small and block out much of the light coming from the eyepiece for more details and for my complete guide please search for exit pupil on my site.
Thank you for sharing about binoculars :)
+Kim Pitman
Thank you for watching! So glad you enjoyed it!
but what means when it saids for example 10x-90x90mm?
It means the zoom. Lets say a 10 x90 binocular is already 10 times closer. At 90° wide vew. 10×90×90 doubles up the widest but not the distance. If you want to see something like about 3 blocks from your house if you live in the city. You need a 12 or 15 (first numbers in binoculars) by whatever number wanted to see wide.
does it not make for wider viewing if going say from 20x 50 to 30 x 80 , does it mean that at 80mm i would still see the same width of view as the 50mm
You'd probably need a binocular with at least 15x magnification, if not 20x. The only problem with binoculars that have magnification that high is that they are hard to hold steady and really should be used with a tripod. In general I'd recommend a spotting scope if you think you might need magnification more than 12x.
thanks for the video ..It helped me a lot
Thank you for watching! We're so glad to hear this video helped.
I'm looking for a binocular that makes a 120 meters look like 1 meter any suggestion.
10x50, 8x42, 40x40 or something like that.
Very informative.
Question: Bigger aperture is needed for larger magnification?
Usually yes, otherwise the exit pupil measurement will be too small.
excellent!
thanks for the answer
would this be suitable for face recognition at 50 yardes Yukon 6-100x100
Using a 10x50 Binocular, with full zoom how close and how wide would i see a person standing a 100 meters away?
what sort of magnification would i require for face recognition @ 500yards
I CANNOT FIND THE SIZE OF THE NIKON TRAVELITE 3 . WOULD LIKE TO BUY SOMETHING BETTER. BUT HOW CAN I FIND THE SIZE OF THE LENS SIZE. THERE ARE NO MARKINGS. LOVE YOUR VIDEOS. THANK YOU.
I'm glad you've liked our videos. All versions of the travelite binoculars have 25mm objective lenses. One way to greatly improve the performance would be to get a binocular with 42mm objective lenses which would give you a much brighter view.
Is 10-70x70 hd binoculars good for bird watching??
thanks
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