Night vision

Submitted: Monday, Oct 03, 2011 at 19:19
ThreadID: 89365 Views:1786 Replies:5 FollowUps:13
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Does anyone use night vision binoculors, goggles monoculars?

I've often thought when out bush it would be really cool to see what animals are around. However they are very expensive. I've heard monoculars are the cheapest and can see the farthest.

So, any opinions on them?
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Reply By: Brian Purdue - Monday, Oct 03, 2011 at 19:30

Monday, Oct 03, 2011 at 19:30
Depends just what you want them for. 7 X 50 are good all round binoculars. They rage in price from about $50.00 to $1500.00. You get what you pay for.
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Follow Up By: Brian Purdue - Monday, Oct 03, 2011 at 19:31

Monday, Oct 03, 2011 at 19:31
Could be a "rage" but I meant a "RANGE".
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Follow Up By: gordon_adel - Monday, Oct 03, 2011 at 19:54

Monday, Oct 03, 2011 at 19:54
You know when you're out bush and you hear some ruffling in the trees. I'm always wondering what it is. One could say it's a drop bear? Would really just be entertainment purposes.

Looking at nightvision.com.au and you see the binoculars are all about $1000 or more. Except for one that is about 3rd of the price, so you have to wonder why that one would be so cheap.

I reckon you're right though...u get what you pay for.
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Reply By: Roughasguts - Monday, Oct 03, 2011 at 20:28

Monday, Oct 03, 2011 at 20:28
I got night vision on me video camera! it's a bit of a yawn range is not far!

Cheers.
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Reply By: Fred G NSW - Monday, Oct 03, 2011 at 22:04

Monday, Oct 03, 2011 at 22:04
Join the ADF and volunteer for Afghanistan......then you'll get to use some sensational night vision equipment and it won't cost you a cent LOL.
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Follow Up By: gordon_adel - Monday, Oct 03, 2011 at 22:26

Monday, Oct 03, 2011 at 22:26
I'll give that one a miss thanks.
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Follow Up By: stoney123 - Tuesday, Oct 04, 2011 at 05:59

Tuesday, Oct 04, 2011 at 05:59
see with your ears, if it bounces and crashes its a wallaby or roo, if it hoots its an owl, if you hear a small squeak and then a minute later a crushing sound then it is the red belly outside your tent eating a bush mouse or rat. (at meroo snakes have learnt that people drop food scraps near tent and that the mice/rats will go there when it is dark :)

Full Moon is the best night vision, and you could also use a torch.


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Reply By: Ian & Sue - Tuesday, Oct 04, 2011 at 09:45

Tuesday, Oct 04, 2011 at 09:45
What a good idea we might have to look into night vision binoculars, they would have been really useful when we were on our around Oz trip last year! We went out at night quite a few times trying to spot nocturnal animals and birds, I was especially keen to spot some wombats but our torch sent them scurrying and I only had a brief glimpse.

Thanks for your suggestion and I hope you find the answers you are after.

Cheers

Sue
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Follow Up By: get outmore - Tuesday, Oct 04, 2011 at 21:15

Tuesday, Oct 04, 2011 at 21:15
try red celaphane over the torch
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Follow Up By: Ian & Sue - Tuesday, Oct 04, 2011 at 21:50

Tuesday, Oct 04, 2011 at 21:50
thanks for the tip - I will store it in my memory bank, next time we are in the ES I will give it a go

Sue
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Follow Up By: Gossy - Wednesday, Oct 05, 2011 at 10:16

Wednesday, Oct 05, 2011 at 10:16
don't bother. Red light travels the least distance; that is why military use it in comms rooms, reading maps etc. There is no cheap alternative to night vision; either spend the money on the real thing or use a white light torch.
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Follow Up By: Rob! - Wednesday, Oct 05, 2011 at 11:05

Wednesday, Oct 05, 2011 at 11:05
Gossy,

I am curious to know why / how red light travels the least distance. I am not sure what that means.
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Follow Up By: Gossy - Wednesday, Oct 05, 2011 at 11:54

Wednesday, Oct 05, 2011 at 11:54
I don't know the 'science' behind it. We just learnt that in the military. That's why control rooms on Navy boats/ships have red light during operational activities, comms rooms have red globes installed for the same reason. Reading maps out bush are only done under cover with a red torch.
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Follow Up By: pt_nomad - Wednesday, Oct 05, 2011 at 12:24

Wednesday, Oct 05, 2011 at 12:24
http://en.wikipedia.org/wiki/Night_vision

In biological night vision, molecules of rhodopsin in the rods of the eye undergo a change in shape as they absorb light. Rhodopsin is the chemical that allows night-vision, and is extremely sensitive to light. Exposed to a spectrum of light, the pigment immediately bleaches, and it takes about 30 minutes to regenerate fully, but most of the adaptation occurs within the first five or ten minutes in the dark.

>>> Rhodopsin in the human rods is less sensitive to the longer red wavelengths of light, so many people use red light to help preserve night vision

as it only slowly depletes the eye's rhodopsin stores in the rods and instead is viewed by the cones.
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Follow Up By: Rob! - Wednesday, Oct 05, 2011 at 12:52

Wednesday, Oct 05, 2011 at 12:52
Yes, I was aware that using red light preserves your night vision, but I was intrigued as to how red light travels a lesser distnace than other visible light. Afterall, all electromagnetic radiation (including visble light) travels at the same speed and the visible the spectrum would not be partially filtered our by our air. Red dwarfs, which can be thousands of light years away, produce red light which still manages to reach us. Hence my question.

I can understand why map reading rooms out bush, at night would use red light but, as I have never been on a ship, I don't understand why on ships. Is it only at night or all the time?
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Follow Up By: Gossy - Wednesday, Oct 05, 2011 at 13:08

Wednesday, Oct 05, 2011 at 13:08
Folks, no offence but we have got off track to the question posted by Ian and Sue.
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Reply By: snoopyone - Tuesday, Oct 04, 2011 at 20:33

Tuesday, Oct 04, 2011 at 20:33
Some good German ones on Ebay for a bit over $600
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Follow Up By: gordon_adel - Wednesday, Oct 05, 2011 at 11:21

Wednesday, Oct 05, 2011 at 11:21
Never thought to look on ebay. Thanks.
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