Re: Color of a rose...
Re: Color of a rose...
- Subject: Re: Color of a rose...
- From: Sean <email@hidden>
- Date: Mon, 8 Jun 2009 23:28:36 -0400 (EDT)
Thanks José,
I see. With all settings on "basic" in ACR = 0, and "tone curve" = linear - (scene referred) I do recover some detail. I was leaning toward underexposure because that red channel loses detail so fast.
With scene referred settings, I can shoot another stop to the right before I lose detail again...
Thanks
-----Original Message-----
>From: José Ángel Bueno García <email@hidden>
>Sent: Jun 8, 2009 5:35 PM
>To: email@hidden
>Subject: Re: Color of a rose...
>
>Hello Sean:
>
>Looking at histogram in ACR after ADNC you first WB the scene (and
>NIKON says with reference white let the compensation to 0 and then
>make white balance), and then measure the reference photemetric gray
>card. If the object is lighter than medium gray CLOSE 2/3 and you will
>have an overexposed image about +2/3 to 1 point and 1/3. If the object
>is darker than 18% gray, then OPEN 1/2 point and you will get a black
>with only 1 point subexposed.
>
>This is what have to be make with traditional photometry, but in DSLR
>almost only the first option.
>
>To accurately resolve your scene you did well in the HDR masking the
>white area left inferior, but the NEF was not.
>
>As Graeme Gill told too, you better avoid underexposure, and look for
>a fine histogram that in my honest opinion don´t have to touch to the
>left or to the right, and Img0271.NEF is absolutely to the left. My
>PS3 is not english version but, Black = 5, Bright = 50 and Contrast =
>25 don´t agree with http://www.color.org/scene-referred.xalter and
>http://www.color.org/scene_analysis_and_rendering.xalter
>
>I use too the same trick that Andrew Rodney lowering contrast in the
>camera screen because don´t want a red flash light to shout all day
>when I know making acurate ETTR.
>
>Have been said what kind of light source?. You shot f/7,1 1/20 s, so
>you didn´t use flash. Subdued light with D65, or A?
>
>Salud
>
>Jose Bueno
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