Nice one tonight, I would give it an 8 on a scale of 10.
I know of two people who lost their green flash virginity this week!
I think most people don't know what to look for. Its more of a green dot and very hard to photograph. It basically looks like this (I couldn't find a really accurate photograph), Once you see it you will see it more often.
And more information than you would ever need at Wkipedia
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Re: Green Flash
Posted by Ike on March 1, 2019, 8:49 pm, in reply to "Green Flash"
Saw my first one tonight!
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Re: Green Flash
Posted by Daniel H on March 1, 2019, 9:11 pm, in reply to "Re: Green Flash"
There goes another one!
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Re: Green Flash
Posted by Brenda Richards on March 1, 2019, 9:39 pm, in reply to "Re: Green Flash"
My first also, how great!
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Re: Green Flash
Posted by Pablo on March 2, 2019, 4:47 am, in reply to "Re: Green Flash"
Good one, Daniel! Lost mine a few years back, Pablo remembers wistfully, such a release...
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Re: Green Flash
Posted by Daniel H on March 2, 2019, 7:17 pm, in reply to "Green Flash"
I read this on the Wikipedia page last night, but when I tried to repeat it to someone just now I couldn't do it. So I looked it up again and realize I never really absorbed it the first time. It says "A green flash also may be observed in association with the Moon and bright planets at the horizon, including Venus and Jupiter". So the new goal it to loose my lunar green flash virginity. So much virginity, so little time.
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Re: Green Flash
Posted by Ron Smith on March 2, 2019, 9:28 pm, in reply to "Re: Green Flash"
I've seen it several times yacht racing from Victoria to Maui. In La Manzanilla I attribute it mostly to singed retinas? Thanks for the photographic evidence. I am watchful waiting each evening. Thanks
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Re: Green Flash
Posted by Chris on March 3, 2019, 1:36 pm, in reply to "Re: Green Flash"
So is it true that the camera never lies? Like Ron I had thought that the green flash effect is retinal. An after image caused by red saturation in the optic nerve. So is it really out there? The sensors in a digital camera (and the old photographic emulsions) are constructed to very precisely imitate the functioning of the human eye. Ergo we still don't know if the green flash effect is generated by our perceptions or if it exists in the world as such. And so on.....
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Re: Green Flash
Posted by Robin on March 3, 2019, 9:15 pm, in reply to "Re: Green Flash"
Just flew in today, went to the crocodile bar for sunset and SAW THE GREEN Flash!!! First time for me after 11 winters here. So cool.
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Re: Green Flash - destello verde
Posted by Daniel H on March 4, 2019, 3:15 am, in reply to "Re: Green Flash"
A new friend also saw their first green flash today and they have been on this planet for close to 70 years! Seems La Manzanilla is the place to loose your green flash virginity - pierde tu virginidad de destello verde i.e. get your pepper popped
Posted by Daniel H on March 4, 2019, 3:46 am, in reply to "Re: Green Flash"
I think the camera never lies thing was pre digital, it certainly lies now, check out deep fakes.
I searched for why the green flash is so hard to photograph (not the first time I have done so) and found this (I give that green flash a 3 on a scale of 10)
Posted by chris on March 4, 2019, 5:30 pm, in reply to "Re: Green Flash"
Hi Daniel,
Thanks for your response. I agree with your score card. Your photos was way better! Certainly the best I have seen. I have yet to hear a clear scientific explanation. The Wiki site was particularly garbled I thought. I am not sure I can do any better but here for the fun of it is my best shot: The reason that the sky is blue during the day is because the very short wavelength part of the spectrum (blue light) is reflected off the water particles in the outer atmosphere and diffused throughout the lower atmosphere. The reason that sun sets are red is that the light from the sun has far more atmosphere to pass through as it nears the horizon than it does when it is high in the sky. (A simple drawing would demonstrate this.) More water particles ( and pollution) equal more refraction and thus only the very long wavelength (red light) reaches our eyes. The visible light spectrum is comprised of blue red and green light. Our eyes are less sensitive to green light than they are to either red or blue light, however the green light is of course still present in the white light emitted by the sun. It is perhaps unfortunate that we usually cant see it. Other creatures probably do see it. However, now and again, when the red light is particularly visible ( as it has been for the last few days) a small portion of the green light becomes visible to the human eye. (don't ask me why I don't know!) The point I was trying to make in my previous posting was, however, a separate, though related one. Here it is in detail: The reason some people see the flash and others, (perhaps even sitting at the same table) do not must surely be physiological? I.e. to do with the colour receptors in the eye and the brain of the individual. At other times the very same person who didn't see the green flash yesterday may see it tomorrow. The camera, in this case, even if it is digital, cannot lie. Why? Because it is constructed to record colour the way we see it. This "machine vision" is calibrated to replicate the total spectrum of light which the human eye can perceive. As such what the camera "sees" is not subject to physiological variation. It therefore follows that our experience of the green flash may be defined as a "subjective" experience. The green flash is therefore a perfect example in favour of Kant's argument that we can never fully know the world as such and that what we see out there is always a product of our perceptual processes.
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Re: Green Flash
Posted by Daniel H on March 4, 2019, 9:38 pm, in reply to "Re: Green Flash" Edited by board administrator March 4, 2019, 9:44 pm
1) Scientific explanation -
Excellent summary, thank you!
2) Individual experience -
First would come the high art of communication. What are we looking for? Green dot would be more accurate than flash. If I can sit next to someone and describe in detail what to look for as it is happening it greatly increases the odds of them seeing it. Once communication is clear perceptual / psychological idiosyncrasies would be next.
3) Photographing -
Machine vision isn't cutting it, why is still open for discussion (in my opinion). The answer is out there someplace. Perhaps green screen photography could give us a clue?
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Re: Green Flash
Posted by Daniel H on March 5, 2019, 3:41 am, in reply to "Re: Green Flash"
on 2) Individual experience -
In between communication and idiosyncrasies you have the rarity of the event. There may be 5 green flashes per year as good as the one March 1st. If you have never seen one before the uncertainty of knowing if it happened can lead to discouragement at best and denial at worst.
on 3) Photographing -
Video seems to be the answer. Some of these are what I see on a good green flash. I wish Paul wasn't using a telescope or zoom since I never do, but this is some dedicated work.
Here is the list of all of them, source is the Wikipedia page.
Posted by chris on March 7, 2019, 1:05 pm, in reply to "Re: Green Flash"
Hi Daniel,
Always a pleasure talking with you.
1) thank you for your kind comment. Im glad to see that Keith's scientific explanation, though far clearer than my attempt was not so very different. 2) Indeed the power of suggestion is astounding: here is a very strange tale: Long before the radio telescope was invented, the existence of the far distant planet Uranus and it's orbit was accurately predicted. The details of it's orbit were calculated mathematically. Once a powerful enough telescope was available : bingo! There it was, exactly as predicted. The strange thing is that a number of years later a researcher went back and checked the maths. They were completely wrong. 3) Green screen. When I quoted that the camera never lies I was being absolutely literal. The statement is limited to the image received by the camera's led sensors(or emulsion)it does not include image manipulation techniques like, for example green screen. Here, as you have suggested, a green object is only green because it reflects the green portion of the visible light spectrum. Remove green light from the source of illumination and any green objects will appear to be black. A different image can then be inserted into these black areas. This is generically known as masking. Your point is well taken. Exactly! If there is no green light getting through our atmosphere at sunset then we will not see any green light. But should some green light manage to get through, then our eyes and our cameras will see it.
However i suspect that the issue is, complicated by the way our eyes function. If overloaded with red and blue they will tend to produce after images in the complimentary colour, ie Green. Now a green flash of this sort is physiologically produced and will not be recorded by a camera. "Machine vision" Unlike the camera human eyes get tired!
So my thesis is that there are actually two different types of green flashes. Only one of them is visible to the camera (machine vision) but both are visible to the human eye. Usually the two types will tend to overlap. This may well suggest why two people sitting together may not see the same thing. The physiological version will tend to be diffused, as after images usually are (a green flash) whist the light from the sun will tend to be more focused (A green dot or patch) In a situation such as this, human vision is thankfully fallible. A bit like this theory!
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Re: Green Flash
Posted by Sophiya Williams on October 1, 2019, 7:28 am, in reply to "Re: Green Flash"
Great Scientific Explanation. If you have any queries related to photo editing services then contact to Graphhene Graphics.
Posted by Kelly on October 1, 2019, 7:59 am, in reply to "Re: Green Flash"
I have seen the green flash many times!! Looking forward to our arrival this month!! We can't wait.
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Re: Green Flash
Posted by Gayle B. on October 1, 2019, 9:03 am, in reply to "Re: Green Flash"
The one view where the whole picture is green, that reminds me of the same green as in the Northern Lights in Norway and Iceland. The whole sky turns the green and then you have the swirling designs moving around. Very beautiful.