> On May 14, 2016, at 5:40 PM, Godfrey DiGiorgi <[email protected]> wrote: > > On some cameras, lens corrections are embedded in the raw files and > automatically applied by raw converters that honor the lens correction > metadata. Not all raw converters allow you to disable the lens corrections. > Nor should you, because such cameras and lenses are designed to be used with > lens correction as part of the total imaging system and won't perform as well > without it. > > Noise reduction in-camera usually means two things: > > - "Long exposure noise reduction" is most typically dark frame subtraction > where beyond a certain exposure length the camera makes the exposure, then > immediately collects noise data from the sensor without opening the shutter > in a similar length exposure in order to model the noise alone. It uses that > to subtract out the noise in the captured image. > > - "Noise filtering" is normally a post-capture process applied to the > RGB/JPEG rendering process. It operates much as noise reduction processing > does in various image processing apps in post. > > On many cameras, filtering can be adjusted for strength and both can be > turned off entirely. On others, there are no such options. > > When I have the option, I usually leave long exposure noise reduction on but > turn off noise filtering. Long exposure noise reduction can be a serious pain > when you're working with very long exposures, however. > > G > >> On May 14, 2016, at 2:11 PM, Paul Stenquist <[email protected]> wrote: >> >> I think you have it right. I don't know if I turned those corrections off, >> but I figure since I shoot RAW it doesn't matter. I think noise reduction >> affects RAW but not sure. I leave it on "auto." I think the Pentax engineers >> are smarter than me. > > —
With respect to lens corrections, I have assumed that Pentax supplies Adobe and others with information about their lenses. Which is why I am able to do post-processing with a lens-correction option in LR. If this is the case, then it seems that my computer rather than the camera is the place for these corrections to be applied to captured files… stan -- 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.
