[LRflex] Re: IMG: Moonrise from the Space Needle
- From: Aram Langhans <leica_r8@xxxxxxxxxxx>
- To: <leicareflex@xxxxxxxxxxxxx>
- Date: Tue, 10 Feb 2015 08:49:02 -0800
I have never noticed that, but maybe I have not taken a photo where the car
tail lights are at such a distance. Is there any way you could send me a RAW
file and I’ll see if another processing program does the same thing?
Aram
Aram Langhans
(Semi) Retired Science Teacher
& Unemployed photographer
“The Human Genome Project has proved Darwin more right than Darwin himself
would ever have dared dream.” James D. Watson
From: leicareflex-bounce@xxxxxxxxxxxxx
[mailto:leicareflex-bounce@xxxxxxxxxxxxx] On Behalf Of Peter Klein
Sent: Tuesday, February 10, 2015 2:24 AM
To: leicareflex@xxxxxxxxxxxxx
Subject: [LRflex] IMG: Moonrise from the Space Needle
We were treated to quite a show during our anniversary dinner.
<https://www.flickr.com/photos/24844563@N04/16304267069/>
<https://www.flickr.com/photos/24844563@N04/16304267069/>
I'd like some advice on a technical problem with this picture, and in fact with
all of the pictures I took of the city from atop the Needle. Red car tail
lights turn white. It isn't overexposure, because it happens even on shots
that I deliberately underexposed drastically, where all the RGB values are
under 255. In shots with any decent city detail, the red channel does hit 255,
but the green and blue are much lower. Lowering the exposure in post, or using
highlight recovery has no effect.
This doesn't happen with larger areas of red light where the pixels have the
same values as the little tail lights. But taill lights turn white, as do other
points of colored light like the blue and green Seahawks colors that still
adorn some construction cranes. The key seems to be that the light sources are
just a few pixels in diameter.
Maddeningly, on the onscreen preview, the tail lights appear red. But when I
"develop" the JPG, they turn white.They also turn white if I blow up the
onscreen preview to 50% size or larger.
The camera is an Olympus E-M5 with 45/1.8 lens, and the RAW developer is
Capture One v. 7.1.2. Here's a screen clip of the whole picture, followed by a
section with and a string of car rears blown up to 400% so you can see what's
going on with the pixels.
<http://gallery.leica-users.org/v/pklein/temp/SpaceNeedleMoonriseScrPreview.JPG.html>
<http://gallery.leica-users.org/v/pklein/temp/SpaceNeedleMoonriseScrPreview.JPG.html>
<http://gallery.leica-users.org/v/pklein/temp/SpaceNeedleMoonriseCars400pct.JPG.html>
<http://gallery.leica-users.org/v/pklein/temp/SpaceNeedleMoonriseCars400pct.JPG.html>
Advice, anyone? Is this just an inevitable result of the Bayer array, or is
there a way to fix it?
--Peter
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