Interesting. So effectively if you don't have stuck pixels you will get less noise with NR of.. A bit of a paradox...
Also i've been doing some tests v/v banding... I'm finding that underexposed shots really exhibit the problem but if you get a good exposure and preferable expose as far to the right of the histogram as possible without blowing the highlights the noise issue almost disappears completely or at least it can be managed with some noise reduction in post processing. Are your experiences similar ? Regards Patrick On 2/7/07, Digital Image Studio <[EMAIL PROTECTED]> wrote: > On 07/02/07, jim <[EMAIL PROTECTED]> wrote: > > On Wed, 7 Feb 2007 00:22:25 +0100, Patrick Genovese wrote: > > > > I have found that with long exposures, the NR takes a long time to do it's > > thing. almost as long as the exposure itself depending on what shutter > > speed used. > > So I turn NR off for long exposures > > (thanks again Thibouille) > > Hopefully it should take as long as the exposure plus a very small > amount of time for processing otherwise it's not working. Dark frame > subtraction (which the integrated NR is) is very effective at reducing > the effect of fixed noise sources but the random noise component will > increase slightly. > > http://en.wikipedia.org/wiki/Dark_frame_subtraction > http://astro.corlan.net/gcx/html/node10.html#SECTION001030000000000000000 > > -- > Rob Studdert > HURSTVILLE AUSTRALIA > Tel +61-2-9554-4110 > UTC(GMT) +10 Hours > [EMAIL PROTECTED] > http://home.swiftdsl.com.au/~distudio//publications/ > Pentax user since 1986, PDMLer since 1998 > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
