Yes. I saw that when reading the manual
and forgot almost at once. There is a
lot to remember. Of course I didn't
register that the dark current exposure
would be the same length as the first
but logic dictates that it would be. But
long exposures hadn't entered my mind
until today.
So -- with noise reduction on its not
only the buffer that holds things up but
the dark current exposure as well. But
always pretty short in my own case. I
wonder if there is a software limit to
the length of the dark exposure? All the
frames (20, 40 and 60) were beautiful --
the noise on the 80s frame was substantial.
Now I've just read another manual -- for
the La Crosse charger -- a lot simpler.
D
Adam Maas wrote:
You can turn this feature off, there's a custom function called 'Noise
Reduction' that turns dark frame subtraction on and off.
-Adam
Don Williams wrote:
Okay. So I make my exposure with no light. Then, automatically, the
camera makes another. The second would be the same, since the first
was taken with absolutely no light; one is subtracted from the other
-- leaving what? The 80 second exposure -- by the way -- was the only
one showing a noisy background that might have been a nuisance; the
others were remarkably good. Maybe 80 seconds is too much for the
noise reduction routine?
This experiment was not done for me. I will never use 1600 for serious
things and the exposures will always be less than a second or two. A
friend in Oklahoma is planning to buy his son a digital camera for
Christmas and asked me to do this test.
By the way, the new camera has not yet arrived. The agents are waiting
for a shipment and will send it next week. I am to send this one back
in the same box. The six volt battery has been running the camera
since I mentioned it had arrived and reads 5.8 volts. The La Crosse
charger, which arrived yesterday, is trying to bring back a set of
NiCads to life that may be beyond resurrection. They were almost new
(unused) but a few years old.
Don
[EMAIL PROTECTED] wrote:
The camera's noise reduction software is telling it to make multiple
exposures. It takes quite a while to complete that process.
Paul
Hi all,
Today I did an experiment to check noise at ISO 1600. I capped the
lens, put the camera in a black bag and made a series of exposures
20, 40, 60 and 80 seconds. But this is the interesting bit:
After the first exposure the shutter wouldn't trip a second time. I
took the camera out of the bag and saw the egg timer was displayed.
It was almost a minute before it disappeared and the camera was back
to normal. This happened after every long time exposure. Does anyone
know why this should be? Why should the buffer unloading itself to
the card, or whatever it is that is happening, take so long to
complete?
Don
--
Dr E D F Williams
_______________________________
http://personal.inet.fi/cool/don.williams
See feature: The Cement Company from Hell
Updated: Print Gallery -- 16 11 2005
--
Dr E D F Williams
_______________________________
http://personal.inet.fi/cool/don.williams
See feature: The Cement Company from Hell
Updated: Print Gallery -- 16 11 2005
