Blown highlights on export, how do I adjust clipping in LR to avoid

Question

I found the thread that explained WHY the highlight were showing in range in LR2 and blown in Cs2.  It a matter of LR using a larger color space, profoto rgb and CS using srgb color.  I get that.  BUT I don't want to deal with changing color space at the end of my processing....
HOW do I change the sensitivity in LR2 to avoid the issue in the first place?  Can I just change the colorspace in lr?

Answer 1

There is no possibility to change colorspace in LR.
And strictly speaking, there is also no possibility to set the colorspace to sRGB in CS2.
What you can do in CS2 is
a) embed the sRGB profile into the image
b) softproof the image for sRGB.
As for blown highlights, you can do the following in LR:
a) increase the recovery slider to a value of at least 40 - I sometimes go up to 80 or 90;
b) reduce Brightness and/or Exposure
c) apply a curve that avoids blown-out highlights and blocked-up shadows.
The last one is my favourite option that I use almost on every image, and it goes thus:
In the Tone Curve panel, click on the small curve-icon below the sliders so that the sliders disappear.
You then can grab the ends of the curve and drag them vertically down (highlights) or up (shadows).
I set my endpoints to about 5% for shadows and 95% for highlights. That corresponds to a blackpoint of about 13/13/13 and to a white point of about 242/242/242 in PS. You can leave the curve linear or give it a bit of a S-shape for increased contrast in the middle-tones.
Save your new curve as a preset. When you now open this photo in CS2 - as a copy with LR Adjustments applied - you will notice that CS2 displays it accordingly. If you open the image as "Original"  the LR-curve will not be applied, and you rimage in CS2 will look unchanged.
WW
PS: My above remarks about colorspace in CS2 my be misleading. What I meant to say that PS displays images in the profile that you created for your monitor with your calibration software - no matter what colorspace is embedded in the image.
But you can softproof and PS will emulate the embedded colorspace on display.