Forgive me if I insist, but if the Moon appears 5 ° wide with 10x, with 100x it will appear 50 ° wide.The 120 arcsecond movement at 10x will still be 120 arcseconds at 100x, not 1200 arcseconds.
I just wanted to know what high power (e.g. 25X) binocular you're talking about.The binoculars to which you refer, is a fancy binoculars to give an example.
If instead you refer to the 25x, it is the Celestron SkyMaster 25x70 which that actually weighs 1350g (and not 1200g as I had written elsewhere).
I just wanted to know what high power (e.g. 25X) binocular you're talking about.
For the record, how many people do you think use a 25X70 bin for birding?
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...... On visits to nature reserves and on ferry boats sailing out to the islands off the west of Scotland I always try to see what make and model of binos other people are carrying. I have never seen anyone carrying binos with an objective size bigger than 42mm so I conclude I have never seen anyone with a higher mag than 10-12x.
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Lee
However, it seems more of a rhetorical question than a useful one.how many people do you think use a 25X70 bin for birding?
A couple of points...However, it seems more of a rhetorical question than a useful one.
The Celestron SkyMaster 25x70 was born (obviously from the name) as an astronomical binocular. Otherwise they would have called it "BirdMaster".
But this does not mean that it can't also be used to observe birds, especially at greater distances.
Of course, the 25x70 format is substantially too bright for daytime and also too heavy to held hand and carry.
But I am instead open to the fact that lighter formats, such as 25x56 and 25x42, can represent excellent tools, ideal both for playful observations, and for long-range identification and recognition.
There are also practical supports, effective and light, designed to support and improve tremors ...
http://www.fieldopticsresearch.com/shop/BinoPOD/p/BinoPOD-Harness-Pack-System-XL-Camo-x4288958.htm
https://media.rainpos.com/833/binopod_harness_camo_h001_h014_20140819100555.jpg
It is apparent you are not a birder. Enjoy your 25X70.points 1 and 2: the exit pupil is not the only factor to calculate the "light power" of binoculars, but it is essential to also use the magnification value. And in daytime hours (from sunrise to sunset), in the open field, the minimum power more than sufficient is on average equivalent to 7x17 = 8x18 = 10x20 = 25x32. Where to satisfy people with the lowest retinal sensitivity, simply increase the values to 7x21 = 8x22 = 10x25 = 25x40.
So, 25x70 = 7x37 (ep 5.3mm) = 8x40 (ep 5mm) = 10x44 (ep 4.4mm) are values that are far too "bright" for anyone. Mostly unnecessary and too heavy compared to the real need.
Get a light saber and you'll understand!"light power?" in my next 45 years as an optical engineer and tech I hope to learn what that is. :cat:
BC
Get a light saber and you'll understand!
points 1 and 2: the exit pupil is not the only factor to calculate the "light power" of binoculars, but it is essential to also use the magnification value. And in daytime hours (from sunrise to sunset), in the open field, the minimum power more than sufficient is on average equivalent to 7x17 = 8x18 = 10x20 = 25x32. Where to satisfy people with the lowest retinal sensitivity, simply increase the values to 7x21 = 8x22 = 10x25 = 25x40.
So, 25x70 = 7x37 (ep 5.3mm) = 8x40 (ep 5mm) = 10x44 (ep 4.4mm) are values that are far too "bright" for anyone. Mostly unnecessary and too heavy compared to the real need.