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[OM] Re: WTB a lens to replace the other

Subject: [OM] Re: WTB a lens to replace the other
From: "Scott Peden" <scotpeden@xxxxxxxxxx>
Date: Sat, 3 Mar 2007 08:44:32 -0800
Nice data on the RAW, I'm seeing more of a use for it should I have the need
in the future.

I'll get back to the other posts and links this evening, right now I'm
headed for the Fall Creek Section of Henry Cowell Redwoods State Park for a
tour/training up to the Lime Kilns and yet Walk, it is just over 5,000 yards
from the car......:-) Now to see if I can find anything other than a fern
that is photogenic.

Scott


-----Original Message-----
From: olympus-owner@xxxxxxxxxx [mailto:olympus-owner@xxxxxxxxxx] On Behalf
Of Moose
Sent: Saturday, March 03, 2007 2:02 AM
To: olympus@xxxxxxxxxx
Subject: [OM] Re: WTB a lens to replace the other

Scott Peden wrote:
> I have pics of a shelf of cameras 25-30 feet away that I took with that
> Celestron, the color variation was interesting though, each shot was just
a
> little different. That is Chromatic aberration?
>   
No 
<http://www.dpreview.com/learn/?/Glossary/Optical/chromatic_aberration_01.ht
m>.

More likely auto color balance with slightly different views of colored 
things and/or mixed lighting. Try one of the fixed color settings. That 
will give you color consistency in such a situation.

Auto color balance only really works on subjects that have all colors in 
them in relative balance. With mono-colored subjects, it works very 
badly. Although this example is with auto color in software, you will 
get a similar effect with it in a camera 
<http://www.moosemystic.net/Gallery/tech/Scan/GreenDoor/9-641_25wb.htm>.

I know you said RAW is not on your agenda yet, but this is another 
reason to shoot RAW, especially in mixed lighting. With JPEG, the camera 
does its color balance thing, and that's what you get. Although it is 
often possible to recover in post, sometimes some colors have been lost. 
With a RAW file, no color balance has been applied, That is done in the 
RAW conversion process, under your control.

Other solutions to accurate color are targets that you shoot under the 
subject lighting which act as reference points in RAW  conversion and/or 
post. My favorite it the WhiBal 
<http://www.rawworkflow.com/products/whibal/index.html>.

Moose

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