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Photography > Photography > Re: Luminosity
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Re: Luminosity

by Jeff <jeff@[EMAIL PROTECTED] > May 6, 2008 at 11:57 AM

KC wrote:
> I usually try to set my exposure so that there will be a whitest white 
> and blackest black, using the full range of illumination.  I use manual 
> mode a lot, and set ISO, aperature and shutter speed accordingly.  I 
> have a Canon S3.
> 
> Occasionally, in below average lighting conditions, I can't adjust the 
> S3 to get a black black and white white.  I get shots which can have a 
> white white and blacks stop at gray, or a black black with whites that 
> stop at gray.
> 
> Is this normal and just the nature of certain exposures or is there 
> always a way to get a full range of lighting?

   Lets say you photograph a gray card. Would you expect the exposure to 
have a true black and a true white?

  And, the quality of light is very important. If you have low contrast 
lighting, don't expect a contrasty image out of that.

   Some cameras have "gamma" adjustments that let you control the 
contrast and the number of stops that is covered. Many photographers 
shoot in RAW  mode and adjust the exposure when they convert out.
> 
  You have an image editor, as long as the highlights and shadows are 
not clipped, you can alway set a true black and a true white in your 
editor. Certain caveats apply, of course.

With that said, not every image needs a true black or a true white. The 
image subject will dictate that.

Keep in mind the guidelines, but don't force them on every image.

   Jeff

> SC




 6 Posts in Topic:
Luminosity
"KC" <kc1234  2008-05-06 09:29:37 
Re: Luminosity
Jeff <jeff@[EMAIL PROT  2008-05-06 11:57:43 
Re: Luminosity
"Ken Hart" <  2008-05-06 16:49:19 
Re: Luminosity
Rob Morley <nospam@[EM  2008-05-06 17:58:27 
Re: Luminosity
Paul Furman <paul-@[EM  2008-05-06 13:19:42 
Re: Luminosity
Vance <Vance.Lear@[EMA  2008-05-08 22:46:42 

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tan12V112 Fri May 16 4:31:56 CDT 2008.