I've uploaded some samples, so you can see what it was like.
Here's one with noise reduction turned on: http://www.oksne.net/lyn/lyn_med_nr.jpg
And a 1:1 detail from around the lightning: http://www.oksne.net/lyn/lyn_med_nr_detalj.jpg
Here's one without noise reduction: http://www.oksne.net/lyn/lyn_uten_nr.jpg
And a 1:1 detail: http://www.oksne.net/lyn/lyn_uten_nr_detalj.jpg
The shot with NR is f/9, 30 s, at ISO 400. The shot without NR is f/10, 30s, at ISO 200. Conversion from raw file done with photoshop CS.
I believe the noise would have shone through even with a wider aperture. What do you think?
Jostein
----- Original Message ----- From: "Herb Chong" <[EMAIL PROTECTED]>
To: <pentax-discuss@pdml.net>
Sent: Tuesday, January 25, 2005 1:44 AM
Subject: Re: Calibrating for CCD/CMOS noise
how noisy was the non-flashed part of the image without NR enabled? i would guess that the reflected light from clouds and so on would overwhelm the noise signal.
Herb...
----- Original Message ----- From: "Jostein" <[EMAIL PROTECTED]>
To: <pentax-discuss@pdml.net>
Sent: Monday, January 24, 2005 10:39 AM
Subject: Re: Calibrating for CCD/CMOS noise
Last summer I tried to photograph lightning flashes. With the dark-frame
subtraction (DFS) on, I lost half the thunderstorm. Of course, with the
precision of Murphy's Law, all the best lightnings happened during DFS. :-)
