I doubt that anyone, under any circumstances, could discern a difference in noise levels between ISO 100 and 200. With the K20D, it's difficult to see a difference between 100 and 400. Even at 800, visible noise is undetectable at normal magnification. For the most part, I would think the best choice for a tripod shot with the K20D would be ISO 200 with extended dynamic range turned one. The EDR function eliminates ISO 100 as a choice but uses that sensitivity to capture more highlights. Paul
On May 2, 2008, at 8:33 AM, Davis, Lee wrote: > > Dear All > > I am trying to catch up with some of the PDML postings regarding > 'correct' exposure of RAW format pictures etc and have come across the > following links, no doubt very familiar to most folk here but I > hope it > doesn't hurt to repeat them: > > http://www.digitalphotopro.com/tech/exposing-for-raw.html > > http://www.luminous-landscape.com/tutorials/expose-right.shtml > > http://www.luminous-landscape.com/forum/lofiversion/index.php/ > t10367.htm > l > > One of the benefits of cameras like the Sony R1 with its EVF was that > you could learn to see the correct exposure as it changed in the > viewfinder. Not so with a K20D Pentax! In a way, I am glad, as it is > making me learn to 'see properly' again ... I hope. > > One question though: exposing to the right will invariably mean slower > shutter speeds. Good that the K20D has shake reduction then but it > occurs to me to ask what is the best ISO setting for minimum noise? > > I gather that digital SLR sensors have a 'base' setting, i.e. its true > sensitivity. Does anyone know what it is for the K20D? Answers to the > same question on dpreview are not conclusive and vary equally between > 100 and 200. > > So, in an ideal world, where I am placing my camera on a tripod for > that > glorious landscape shot, what is the best ISO setting for image > quality > - 100 or 200? > > Thanks > Lee > > P.S. What on earth does 'PESO' stand for? Is there an FAQ for this > list? > > > -- > 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.
