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[OM] Re: True confessions of a Moose

Subject: [OM] Re: True confessions of a Moose
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxx>
Date: Sun, 13 Aug 2006 06:48:46 -0400
Durn it!  Stop confusing me with facts!

Chuck Norcutt

Moose wrote:

> Chuck Norcutt wrote:
> 
>>My main criticism isn't the color.  I wasn't there and have never been 
>>to Yosemite let alone this particular spot.  It looks unreal to me 
>>because the sky is too dark.  Regardless of the sun angle or the 
>>altitude of the rocks vs the foreground the sky can't be less bright 
>>than what it's illuminating.  The sky is that big diffuser thingy up 
>>above and the source of the light.  Gotta be brigher there.  
> 
> As a matter of theory, I have to disagree with you. To go far afield, 
> the sunlit surface of the Moon is brightly lit, so bright that it still 
> seems bright as reflected light over 360,000km away, and yet, the sky is 
> black. The illumination here also comes entirely from the sun. Certainly 
> quite a bit of it is bounced around by the atmosphere, the amount 
> depending on how much of it is above and how much below the subject. The 
> higher you go, the darker the sky. No, 6,000 feet doesn't have much 
> effect, at least to our eyes, but look at the variation in sky 
> brightness in your panorama at sea level. Perhaps it doesn' take much to 
> be apparent in a photo.
> 
> Consider a lone tree in a desert in the middle of the day. The tree's 
> shadow is very dark compared to the surrounding ground. If the sky as a 
> whole were anywhere near as strong a light source as the sun, the shadow 
> would be washed out by that light coming from all other directions.
> 
> I'm not disagreeing with your contention that the sky in my shot is too 
> dark, only with your stated reason for saying so.
> 
> How about if I pretend that I used a polarizer? :-)
> 
> Moose



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