Ok, so woohoo! I finally got a couple of images uploaded. These are FULL resolution, so biiiig files, but I wanted to put them up as that so that you can truly see the noise that I am talking about.
#1, shot with FA 50mm f1.7 @ f2.2, 1/125, ISO400, (shot in RAW+, and this is from the jpg generated by it), no flash, handheld (which is why I chose the faster shutterspeed). This entire shot WAS underexposed by about 1.5 stops, so some noise is expected http://www.lovebytes.com.au/galleries/Noise%20example3.jpg #2, shot with DA* 18-55mm (kit lens) @ f4, 1/25, ISO400, (shot in RAW+, and this is from the jpg generated by it) no flash, shot on tripod. There is a lot of noise in the shadowy areas of this shot, particularly on the areas which show the orange wall. http://www.lovebytes.com.au/galleries/noise%20example.jpg #3, shot with FA 50mm f1.7 @ f2.8, 1/40, ISO400, (shot in RAW+, and this is from the jpg generated by it), no flash, handheld. I am HAPPY with the noise in this shot, even in the darker, underexposed areas, it renders quite nicely, and I don't find it offensive at all ;-) http://www.lovebytes.com.au/galleries/Noise%20Example%202.jpg I am yet to play with the RAW files from these shots and only hope that they prove to be better! Love to hear any thoughts or advice you guys can offer! Tan. -----Original Message----- From: pdml-boun...@pdml.net [mailto:pdml-boun...@pdml.net] On Behalf Of paul stenquist Sent: Monday, 8 February 2010 1:31 PM To: Pentax-Discuss Mail List Subject: Re: over exposing to reduce noise?? On Feb 7, 2010, at 10:19 PM, Igor Roshchin wrote: > > > Based on what Paul said today and previously, it looks like there > might be a sample-to-sample variation. > I have my K-7 set to +0.7 - +1.0 for most of the indoor shots. > This is when the metering is set to center-weighted ("green") setting. > I never use center-weighted. I use the multi segment almost all the time. It's much more accurate on average. For tricky situations, I use spot metering. Paul > Igor > > paul stenquist pnstenquist at comcast.net Sun Feb 7 15:58:45 CST 2010 > > > It's okay to expose to keep the shadows from going completely dark, > but you usually shouldn't need plus 1 or 2. I rarely have to use plus > EV with the K7. When I do, it's usually +.3. or sometimes +.7 when the > most important part of the shot is in shadow. If you expose accurately > at ISO 400, you won't get a lot of noise. The fur protesters pic I > posted yesterday is ISO 400 in program mode with no exposure > compensation. The doorway is pure black but there's no noise: > http://photo.net/photodb/photo?photo_id=10637125&size=lg > This pic is ISO 1250. I was in program mode, which picks f4 with the > DA* 50-135. I went with +.7 EV because her face was shaded, and I > pulled back the highlights in conversion and burned in the hot white > papers on the table after converting: > http://photo.net/photodb/photo?photo_id=10637141&size=lg > This shot is ISO 6400, shot at the meter reading in aperture priority > mode. There's noise in the deep shadows but the main subject is > relatively noise free, and he was exposed correctly. No post work to > speak of on this one, other than a slight application of PhotoShop noise reduction: > http://photo.net/photodb/photo?photo_id=10541951&size=lg > > Paul > > On Feb 7, 2010, at 4:24 PM, Tanya Love wrote: > >> Would this work? After my initial shoot yesterday with my K-7, I >> have > been really surprised about the noise in the shots. My brief required > me to shoot the interior in only available light (although I did cheat > and use a little bit of flash bounced into some of the shadows some > time), and there is A LOT of noise in the dark (shadow) areas of the > images. (I will post them later but can.t log into my ftp server > right now for some reason, and I am sitting here on hold to the > hosting company as I type this!). > >> So, my question is this . if I am shooting in RAW, it means that the >> HDR > function does not work. Noise wasn.t a problem like this with the > *istD, so I.ve never really thought about this in depth, but if I were > to deliberately overexpose by one or even 2 stops (but not too much to > completely blow out the highlights), and allow more light into the > shadow areas, would this eliminate much of the noise in the darker > portions of the pictures? Because I am shooting in RAW, it shouldn.t > be that hard to adjust the curves/levels in the RAW converter to > compensate so that is no problem, but NOISY pictures (especially for > print magazines), certainly IS! >> >> TIA! >> >> Tan. . > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. __________ Information from ESET NOD32 Antivirus, version of virus signature database 4845 (20100207) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
