It appears the K20 with V 1.03 of the firmware slow shutter speed noise
reduction gives you two options, 1. Auto, the camera decides when to
apply noise reduction; 2. On, noise reduction will be applied when the
shutter speed is > 3/10 second. There does seem to be no off position.
Weather there is a design issue with the 14mp sensor that makes shots
without dark frame subtraction unacceptable, or Pentax is just being
very conservative is a matter of conjecture, as there is no way to turn
it off, to test. (If you look at the way High ISO noise reduction works
it kicks in even if it's been turned off if the ISO is over 3200 but
noise seems to be much better controlled than with the 6mp cameras).
Ralf R. Radermacher wrote:
Graydon <[email protected]> wrote:
I think that policy supports my "B could be used to take a really awful
picture" theory; at high ISO (= pushing the sensor) and long exposure (=
heat builds up), noise is a serious issue without DFS. So somebody at
Pentax has enforced DFS for B mode, because the camera doesn't know how
long the exposure is going to be in B mode and can't do a calculation.
Even my old K10D knows the difference between less and more than 1 sec.
That's its threshold for doing a DFS in B mode.
I understand that the K20D does a DFS for everything longer than 6 sec
in any mode regardless of the ISO setting which again hints at serious
trouble with this Samsung CMOS sensor.
Ralf
--
The free man owns himself. He can damage himself with either eating or
drinking; he can ruin himself with gambling. If he does he is certainly a damn
fool, and he might possibly be a damned soul; but if he may not, he is not a
free man any more than a dog.
--G. K. Chesterton
--
PDML Pentax-Discuss Mail List
[email protected]
http://pdml.net/mailman/listinfo/pdml_pdml.net
to UNSUBSCRIBE from the PDML, please visit the link directly above and follow
the directions.
