Yes I guess I was being a bit stupid... it's late :) I knew some digicams did dark frame subtraction, you could notice them pause for as long again after the exposure. I somehow assumed that raw meant raw straight off the sensor always, but I guess not. I just tried a 4sec exposure and yes it does wait another 4sec before the review, hadn't noticed before.
Curiously, I can hear the SR working all through the second exposure. And also between shots on continuous mode... was trying out new, slower, SD cards tonight. Seems like a waste of power but maybe it's not enough to worry about. Michael On 07/11/06, Godfrey DiGiorgi <[EMAIL PROTECTED]> wrote: > That's exactly what the DS' NR does: dark frame subtraction. > It must operate on sensor data to be effective. :-) > > Godfrey > > On Nov 6, 2006, at 8:11 PM, Michael Abbott wrote: > > > Wow that's interesting. I'd assumed, seeing NR in the menus, that it > > only applied to jpegs. > > > > Do you know what it's doing? Presumably shooting another frame with > > the curtains closed and subtracting, as anything else would make more > > sense to do afterwards when 'developing' the raw file. > > > > Michael > > > > > > On 06/11/06, Godfrey DiGiorgi <[EMAIL PROTECTED]> wrote: > >> The DS' Noise Reduction kicks in at around 1/8 second or so. > >> > >> Here's a comparison picture of NR on and NR off offers for a 30 > >> second exposure, processed from RAW with both Vuescan and Camera Raw: > >> http://homepage.mac.com/godders/straight-NR-comp.jpg > >> > >> I'll have to go back through my archive to get the EXIF data for #s > >> 6194 and 6193 PEF files. > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
