From slide photography, blown highlights are where the slide was so overexposed
that there is only clear film base where there was supposed to be detail.
Extending that to digital is easy. The negative film equivalent is where the
shadows are clear film base (underexposure) although we have seen so many
photos over the years where the print is just black where the shadows are
supposed to be that is is not considered as much a defect as blown highlights
are.
In your other post of the bride if the dress had been overexposed to the point
where you could not pull out any detail whatsoever, that would have been blown
highlights. However, even though you had to photoshop to bring them out they
were there to bring out so they were not blown.
If one is constantly getting blown highlights it is simple to set the exposure
compensation to -0.5 stops or so permanently and not worry anymore.
On the Internet, where many monitors are not well calibrated, often what
appears to be blown highlights on the screen is simply the monitor whitepoint
(adjusted with the contrast control) set too high. When you adjust your monitor
with Adobe Gamma for instance they tell you to set contrast at 100%, but better
seems to be about 95% then you do not get those false blown highlights on the
screen.
graywolf
http://www.graywolfphoto.com
"Idiot Proof" <==> "Expert Proof"
-----------------------------------
[EMAIL PROTECTED] wrote:
One of these days you are going to define it so I understand it? Exactly what
is a blown highlight?
Marnie aka Doe :-)
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