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Re: [OM] Be careful where you sit...

Subject: Re: [OM] Be careful where you sit...
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Sun, 04 Jan 2009 12:32:38 -0500
Sorry, but I still don't understand.  If, in your first sentence, I 
replace "subject" with "light source" and "illumination of the subject" 
with "intensity from the light source" I have replaced subject with 
light source and the statement remains true.

I'm still missing something very fundamental.

Chuck Norcutt

WayneS wrote:
> At 11:41 AM 1/4/2009, Chuck wrote:
>> <snip>  What I don't 
>> understand is why, once the light has struck and reflected off the 
>> subject, why the subject is not treated as the "light source" for the 
>> reflected light that's emanating from it in the same sense as the sun is 
>> a light source.
> 
> The subject just gets smaller with distance. Hence there is less light
> reaching the lens, but the illumination of the subject is the same, just
> that its size in the frame is smaller.
> 
> If it is the only subject, then an average meter would vary, but a spot
> meter on the subject would be constant with distance.
> 
> WayneS
> 
> 
> 
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