Moon ! - GFXartist.com - Served over 20,000,000 artworks

Back to forum overview

Back to topics

Moon !
Almost-Human \| 03/16/2008 @148 \| edit post

I have mentioned the exposure for moon shots a few times here on GFX,
The rule is simple, its 1/125sec at f8 or any combination that gives you the same exposure...

Now, recently, I explained to a member here that the night sky is in fact not black but BLUE..
and you can if you expose long enough, get a "almost" traditional day time photo of any night scene which had moonlight in it !! they found this funny

And here is the proof

http://www.tofahrn-foto.de/Night/index.php?lg=en 6 minutes exposure...

YOU need to scroll down the left hand side frame of the website and click on the "FULL MOON" image...
Its not the best example of what I was saying but gives you an idea !! I first seen this with a standard film camera..
the only give away is that the stars move

Re: Moon !
SandraS \| 03/16/2008 @190 \| edit post

I never knew that! It looks just like it was taken in daylight. I don't understand how a long exposure can make a picture bright like this... Strange.

Re: Moon !
ThruMyEyez \| 03/16/2008 @270 \| edit post

There you go mooning us again!!!

Re: Moon !
ethegaurde \| 03/16/2008 @275 \| edit post

Nice.

Re: Moon !
Millink \| 03/16/2008 @441 \| edit post

Never knew that

But makes a lot of sense thinking about it. Blue light has a lot of colours in it, thus reflecting colours perfectly.... Nice

I did take photos with shorter exposure times. This shows the yellow light we can't see at night because our eyes are used to it:

Different, but same idea...

Re: Moon !
Almost-Human \| 03/16/2008 @534 \| edit post

_quote:
SandraS wrote on 03/16 @190
I never knew that! It looks just like it was taken in daylight. I don't understand how a long exposure can make a picture bright like this... Strange.

Its because moonlight is full spectrum Daylight, it comes from the Sun its just weaker, so longer exposure gives you the same result as daylight !

Re: Moon !
Almost-Human \| 03/16/2008 @536 \| edit post

_quote:
Millink wrote on 03/16 @441
Never knew that But makes a lot of sense thinking about it. Blue light has a lot of colours in it, thus reflecting colours perfectly.... Nice

Different, but same idea...

Well what you got is Light pollution, light from groound based lights caught in the clouds or more likely dirt and dust in the Air.. very bad in cities and towns but not in the middle of nowhere..

There is in fact a town somewhere in the states that doesnt suffer from it and as far as I remember its full of people into astronomy !

Re: Moon !
pyrokid \| 03/16/2008 @798 \| edit post

_quote:
Millink wrote on 03/16 @441
Blue light has a lot of colours in it,

Isn;t blue a natural primary colour, that means that it has no other colours in it I'm confused, how does that make any sense, Millink has only worsened the little understanding I had of it, please explain.

Re: Moon !
slaphapy5 \| 03/16/2008 @807 \| edit post

light and pigments are different... blue as a pigment has no other colors in it.. .It's a subtractive color... Ie. paint. light is additive... and is made up of primary colors of Cyan, Magenta, and Yellow (and black is added in a color wheel because you can't created black out of light) which is CMYK. and on that color wheel blue is made up of cyan and magenta primarily.

the reason that at night you see a blue sky is because the light temperature is very high... daylight is 5500-6000 which is quite blue. and if I'm not mistaken. at night it reaches temperatures of about 11,000 K VERY VERY blue

and the reason that picture is yellow is because those street lamps are probably using sodium vapor bulbs... which is about 2800K I believe. very yellow/orange.

Mark

[Message edited on 03/16 @809]

Re: Moon !
Almost-Human \| 03/16/2008 @819 \| edit post

_quote:
pyrokid wrote on 03/16 @798
[...]

Isn;t blue a natural primary colour, that means that it has no other colours in it I'm confused, how does that make any sense, Millink has only worsened the little understanding I had of it, please explain.

OK, I mentioned it in the second post, The moon light is full spectrum ! full daylight, just dimmer. think of the moon as a reflector or piece of card in space reflecting sunlight onto the dark side of the earth !

Re: Moon !
Millink \| 03/16/2008 @940 \| edit post

Just you guys wait and my ingenious ways of causing disorder and misunderstanding will be taken to a whole new level!

Re: Moon !
emarts \| 03/18/2008 @247 \| edit post

_quote:
slaphapy5 wrote on 03/16 @807
light and pigments are different... blue as a pigment has no other colors in it.. .It's a subtractive color... Ie. paint. light is additive... and is made up of primary colors of Cyan, Magenta, and Yellow (and black is added in a color wheel because you can't created black out of light) which is CMYK. and on that color wheel blue is made up of cyan and magenta primarily.

Additive colors (colors that come from light) are red, green, blue. If you ADD equal amounts of RGB, you get white. CMYK are subtractive colors (colors that are reflected from light). Theoretically, if you add equal amounts of CMY, you get black. But subtractng CMY, you get the color of the paper (i.e. white).

Light sources, such as a monitor or tv will use varying amounts of Red, Green and Blue to produce all the visible colors of the spectrum. Offset printing uses Cyan, Magenta, Yellow and Black to produce only about 3000 variations of the visible spectum. Add custom colors such as Pantone inks and you can get more vivid color.

[Message edited on 03/18 @251]

Re: Moon !
Byonder \| 03/18/2008 @258 \| edit post

_quote:
Millink wrote on 03/16 @441
This shows the yellow light we can't see at night because our eyes are used to it:

[image]>

Different, but same idea...

Actually, the white-balancing is just off:

If you bring a white-card and set your white-balance for that, your shots should come out looking a more-or-less "normal" hue.

[Message edited on 03/18 @692]

Re: Moon !
Millink \| 03/18/2008 @651 \| edit post

Got that

Thanks

Read the Terms of use and Privacy Statement.
This site is a property of Brothers in art For more information and support, contact .

@920: arielgulluni
@919: niggle
@919: Llogres
@919: Censored-Girl
@917: Packman
@917: locus

Web GFXartist.com