Scanning for Rawtherapee

Hi.

I am starting to learn how to use Rawtherapee. In fact, I'm starting to learn more about digital files...

I have a V800, using VueScan and (mostly) Silverfast 8 SE.

For color film, I have the following possibilities :


With TIFF and Negafix, the film easily inverted. For DNG, I tend for now to inverse the curves in Rawtherapee.

Question : Which format (TIFF or DNG) and bit (16 to 64) maximizes the benefits of Rawtherapee 5.8 (soon 5.9), regardless of the final use of the photos?

Thanks

Tiff and DNG are effectively one and the same. DNG is tiff with a handful of adobe LR specific meta data tags. Adobe owns the tiff specification. Tiff tends to have better compatibility than DNG as not all software actually supports all the DNG tags.

in terms of bit depth, 16 bit per color is fine and has wide support. You won’t see a difference with a higher bit depth with current display and print technology, and that is very unlikely to change enough to make a difference any time soon.

So HDR is not a format per se like the TIFF/DNG. It would be a "TIFF" with specific data for the HDR line of Silverfast Software.

I will stick with TIFF + Negafix at 48 bits.

Thanks.

Papineau said:

So HDR is not a format per se like the TIFF/DNG. It would be a "TIFF" with specific data for the HDR line of Silverfast Software.

I will stick with TIFF + Negafix at 48 bits.

Thanks.

Click to expand...

Technically, HDR is any image with more than 12-13 stops of usable DR. The sRGB spec only displays ~12 stops of DR, and paper is even less, so if you have more than ~12 stops of image information, in order to actually see it, you have to tone-map it into the visible DR. How that is done can be accomplished via a variety of ways. You can do it in camera with graduated ND filters, or make multiple captures then blend them together after the fact.