Moose wrote (my response at the bottom)
> Message: 64
> Date: Wed, 01 Jun 2011 21:08:15 -0700
>
> On 5/19/2011 3:20 PM, Brian Swale wrote:
> > A couple of shots to begin with. . . .
> >
> <https://www.facebook.com/media/set/?set=a.1971931971123.115210.1027725807
> &l=8d7b1e68 2b> > > 1/13 sec. f/16. ISO 320 31mm tripod for closeup > 1/60
> sec f/8 ISO 320 19mm tripod for wider shot
>
> On 5/31/2011 5:07 AM, Brian Swale wrote:
> > <clip good advice on photographing flowers>
> > To my eyes, aspects of some of your flower shots that bother me are . .
> > .
> > (c) highlights on the subject that are too bright (use RAW?)
> > . . .
> >
> > If I've got this wrong, throw a bucket of cold water over me and move on
> > . :-)
>
> I think you've got it quite right. However, your last image posts, like
> some before them, have blown highlights themselves.
>
> In the otherwise lovely images of fallen leaves in excellent compositions,
> some of the brightest leaves are almost white, rather than yellow. A
> little investigation shows that this is because the red & green channels
> are clipped.
>
> One effect of channel clipping is that it changes colors. Here, many
> leaves range from their true color to a much lighter shade of yellow to
> white. in these images, the red channel is heavily clipped, and the green
> somewhat less so. Where only the red is clipped, the pixel will be an
> oranger shade of yellow. Where both are clipped, they approach the blue
> level. With all three closer to even, the pixel is closer to white.
>
> I've overdone bringing down the highlights, I hope making it clearer where
> clipping has occurred, and included histograms.
> <http://www.moosemystic.net/Gallery/Others/BSwale/Fall_Color.htm>
>
> I can't know whether this happened in the original capture, in
> conversion/processing or in whatever Facebook does to them.
>
> There is a little clipping in the red images posted next. Doesn't do much
> but throw off colors we don't know anyway and obscure some surface detail.
>
> Don't Clip Moose
These images were taken in bright overcast; more overcast for the leaves
than the bowl. If you wanted to see highlights *really* blown out, one had
only to wait until the sun was shining at full blast.
I was aware of the leaves showing white, but they are few.
The dampness brought out the colour in the leaves which were not reflecting
straight back at me, and for me they were the main part of the shots. I went
out in the wet because I knew the colour would be good then.
AFAIK I don't have the means to measure clipping or to do anything about it.
By and large I accepted them as the best I can do.
I also took some shots on film.
I may post them on my own site as I can do images at whatever size I want
to there, c.f. facebook which limits size max. I have some others to do
there anyway.
Brian Swale.
--
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