I agree. I turned it off, initially, because I had seen some results
indicating that it affected image quality in the 1/10-1 second
exposure time range negatively, but I haven't seen any substantive
evidence to prove that since. I've just left it off as it isn't
supposed to kick in until exposure times grow longer than I can hand-
hold effectively anyway ... I turn it on when I'm working with long
exposure times using a tripod.
Here's my page showing the effectiveness of the NR option at 30
second exposure times:
http://homepage.mac.com/godders/straight-NR-comp.jpg
Two images were made, identical settings, one with and one without NR
@ 30 second time, ISO 200. I chose to underexpose a stop or so in
order to exaggerate the noise, and I used both Vuescan and PS+ACR
converters (Vuescan does no hot-pixel-removal, ACR does), each set
with identical parameters for the complementary exposures. BTW:
Ignore the cruddy bit in the center of the rightmost frame ... I
think I accidentally made a small selection there.
Godfrey
On Aug 30, 2005, at 8:30 AM, Bruce Dayton wrote:
The only one on Godfrey's list that seemed like you might want to
think more about is Noise Reduction. It actually doesn't kick in
until the shutter speed gets below a certain point. The general
reason to have it on is so that the thermal noise from the sensor is
removed from the image by means of a second 'dark' exposure. Saves a
massive amount of cleanup in some cases. The reason to have it set to
off is that when shooting slow shutter speeds, the dark frame
subtraction takes twice as long per frame as it has to take another
image for the same length of time. So a 30 second exposure will take
60 seconds before you can shoot again. It is an easy setting to
forget about until it is too late, so I leave mine on because mostly I
want it on.
Tuesday, August 30, 2005, 4:38:32 AM, you wrote:
Those are all the settings which I've made, as different from the
defaults. I didn't see the point of listing all the default
settings;
they are clearly listed in the instruction booklet starting on
page 174.
F> Thanks, Godfrey. You therefore provided exactly what I was
looking for - a
F> list of non-default settings to consider and then likely at
least mostly
F> implement almost right from the start. Thanks again.
