Jys, Thanks for the tips, they absolutely me sense. I used a 2700k led until now, but will definitely give a try to a cooler e17 bulb.
M > On 2020. Aug 13., at AM 7:08, jys <[email protected]> wrote: > > > >> On Wed, Aug 12, 2020, at 08:24, Miklós Müller wrote: >> As for the scanning resolution, I have to resort to my 6MP Nikon D50, my >> budget does not allow for more ATM. >> >> Here's the scanning rig BTW: https://photos.app.goo.gl/8dUqTJkvmsdm9BTY8 > > That is a beautiful reproduction rig, but... if it's as old as it looks, I > guess it uses some kind of incandescent light source? If you want to make the > most of your camera's dynamic range, you probably want to use a very "cool" > light source (6500K, aka "daylight", or even add some gels to make it even > more "blue"). This way, you won't end up with such an underexposed blue > channel in order to avoid clipping the red channel; it will move them all a > little closer together in the histogram. This crudely approximates what film > scanners do by exposing the different channels for different lengths of time. > It just helps with not having to push the digital stretching of the blue > channel quite as hard. Take a shot without film loaded to get a white balance > for the light itself, and use that WB setting for all the shots, then use the > negadoctor module to further adjust for the remaining orange mask. > > In addition to the links already provided for information about negadoctor > module, also pay attention to the tooltips when hovering over the slider > labels - there's a lot of information there. > > And, just for my take on processing one of the old negatives, attached is an > XMP for the first one, which also uses the color balance module to further > correct some of the extreme color cast into something a little more neutral. > Note the use of the parametric blend to constrain the processing to the > shadow areas. You could do even better with more time spent on the masking, > but it's a quick example. :-) > > -- > jys > ____________________________________________________________________________ > darktable user mailing list > to unsubscribe send a mail to [email protected] > > <20200807-114609.nef.xmp> ____________________________________________________________________________ darktable user mailing list to unsubscribe send a mail to [email protected]
