DSLR as Scanner for Color Neg
DSLR as Scanner for Color Neg
Image > Adjustments > Invert.
Done.
This got me thinking about how to do color negatives. I have a Besseler Dual Mode (holds 6x6 or 6x7 directly, or use its 4x5 illuminator for bigger negatives). With the Besseler, I can dial in quite a bit of color filtration. The dichroic head from a color enlarger could do the same thing.
In particular, I want to scan 6x9 Ektar color negatives. I'll be using a D300 and 55mm Micro Nikkor at roughly 1:3, right in the sweet spot for this lens.
The big question is the orange mask in color negatives.
First about resolution: With this camera/lens at this magnification, the resolution is close to what I get from my V500. Should be fine for prints up to, say, 12x18. For more resolution, I can use a different body or just shoot in pieces and assemble as a panorama.
How about dynamic range and color correction?
Shooting with white light, the histogram looks awful and the results are poor. Shoot in RAW, convert, invert to a positive, and start adjusting. Here's where the histogram is awful: red is way to the right, green OK, and there is hardly any blue. With the curves tool in photoshop, I can restore neutral grays, but this is not good color.
Second try: dial up the color filtration to push more blue through the orange mask. I found a setting of 0 Y, 60 M, and 110 Cyan on the Besseler filtration gave a fairly neutral set of color histograms on my D300. This RAW file was easier to process, I could restore neutral grays, highlights, and shadows, and the color seems about right. Here's a sample, from a 35mm frame of Fuji 200:
Colors look about right to me in the film boxes, the wall, and the marble counter top. Magenta in the bottle is probably not right.
Anyone else doing this:
- DSLR as scanner
- Color filter on light source to put more blue into the RAW file
- Invert and color correct in Photoshop.