phat_bog is right, my problem maybe isn't iso but also dynamic range.
I'll try to give you more information. I'll post picture later, as now I'm far away from them. there are lot of examples anyway on my webpage
massimilianomoro
I use lightroom since it appeared, tried during the years various softwares and my first pentax was an istd* so the problem of development and learning digital technique should be covered. (for what it is worth I studied photography for 2 years)
My sculptures are all built with colored high power LED with terrible CRI and most of the time touching UV or IR light. I'm very used to have huge color shift issues when I use blues for example. the pictures I need are normally of the shadows that objects and people cast over walls or ceiling.
what I need is a wide angle picture that cover all the room and details of the shadows.
mostly they are in motion, so a tripod can't help because I have anyway to freeze the movement, so I can never shoot under 1/30th
in the room usually there is enough light for the sensor, but as it is coloured it gives often a false reading, what's more problematic is that it's not evenly illuminated. so maybe in the same shot I have a very bright side and a subtle shadow. for example half of the pic need 1/500th and other half 1/10th.with the k01 if I go for the fast I can't recover the dark side, and if I go for the dark the bright part are burned.
same goes for reducing noise software: some shadows intersections are very small and subtle, so if I go for aggresive NR, I loose all details.
a faster wide angle lens would certainly help as mine are all f4, the f1.2 of the k50 helps a lot, but I really like the portability of the pentax primes, so my thought was instead of changing lenses changing the body to recover those stops I loose withe the slow f4 or 2.8 of the 35mm...
the k01's sensor is old, so I thought that maybe a newer one can react better on adverse scenes as are mines.
sigma 30 1.4 is appealing...I tried it on a canon body and it was very good...but it isn't wide enough...
thanks for all the help.