Negative Conversion

I am currently digitizing old color and b/w negatives. I therefore propose to add a negative conversion that will, after its application, let me use all sliders like on positive images.

Today’s workaround with the help of the tone curve (make \ from / ) changes the sense of many sliders.

Meanwhile, NegativeLab Pro (NLP) version 2 is out and I got myself a license.
It’s a pity that the built-in technology is not available in DPL :wink:


The two images have been converted by NLP from raw files I took - photographing a Kodacolor 400 negative I had exposed and developed in 1978.
Of course, the late summer aspen leaves could be spruced up a little to make the images more palatable for modern/digital times, where colours cry out loud.

Note: NLP is a plugin for Lightroom.

You should generate an own Preset for negative conversion. It is not suitable for you ? The advantage is such a conversion, that you should select the proper film material in the Filmpack tool.
I think the Filmpack made particularly to support the scanned images characteristics. Any general negative scanning Preset certainly will produce worse color fidelity.

Endre

…using NegativeLab Pro in Lightroom requires no special preset, NLP does it all.

For tests in DPL, I indeed have a preset that just flips the R, G and B lines in the tone curve tool from / to \ - which I found easier to use than flipping the RGB curve.

I found that setting up several presets does not necessarily speed up customizing because I had to adapt settings to exposure variations too, not only to film brand and model and iso and possibly variations in development by the original labs etc.

As for results, both NLP and manual processing deliver good results that can then be refined in one of the NIKs…

Hello,
If this can be helpful to all the negative conversion people:
There is a live talk today with Smugmug/Flickr HERE. In the youtube description you will find a link to a blog post about it.
Have a nice day :slight_smile:

Hi, I’ve only just caught up with this thread. This would be not only a really useful addition to PL but would also help make it a one stop shop program.

I presume color or B & W negatives would be scanned to produce the files for processing. My Epson scanner has scanning options for color and B & W negatives.

I haven’t tried scanning negatives, but if the Epson options are good, would a conversion option in PL be needed?

…imagine taking photos of your negatives. Many of us have decent cameras that can serve to reproduce film negatives with high quality and in less time than a scanner takes. Negative conversion would be a nice complement for people who shoot film.

Thanks, I just learned something; using a camera as a scanner. I can see the speed advantage, but isn’t the cost of a decent camera, a light box, etc. a little high for a hobbyist like me?

Only you will be able to decide if the camera you own can also photograph a negative :wink:
Appetite comes with eating, you can always start small to see if things work for you.
As for processing, you can check a few starters like this:


or


or

The Epson options are good but not necessarily good enough for high quality publication. NegativeLab Pro and other programmes are very useful - especially with archive negatives scanned with something like the Hasselblad Flextight scanners. Currently I have to go back into Lightroom just to use the plug in. It would be great to be able to do everything in PL.

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Hello :wave:t4:

I am now also diving into the negative “scan” and conversion ocean now.
I do not use Lightroom anymore so Negative Lab Pro is not an option.
Yesterday I stumbled on this “small” but effective App: FilmLab.

My main problem is to remove the strong orange colour cast from the negative.
I might encounter other “problems” with other types of negatives… who knows.
I do not want to spend much time on one single photo, so I like the fact this tool make good correction automatically.

My workflow (I am still using the 14 days trial) is:

  • take the best picture possible of the negative (RAW)
  • open the RAW with PhotoLab to process it with DeepPrime
  • export as a DNG
  • open and process it with FilmLab

I wish DxO would provide the necessary tools in a future update of FilmPack :grin:

There is a way that you can do it totally within PhotoLab

(image taken from a dpreview article)

This is only a jpeg file, RAW would work better.

Start by reversing the three colours in the curves tool

Then use the white balance pipette on the unexposed border of the negative

This should give you a “near enough” neutral white balance. It works better with a RAW image

Then return to the curves tool and adjust the RGB curve to enhance the contrast

At this point, You can either continue with the original image (but be aware that a lot of the sliders now act in reverse) or export to DNG to get a “fresh start” with the now positive image.

It’s not perfect but it can be done with only PhotoLab and a bit of patience :nerd_face:

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Essentially, a few steps can do the trick (and some negatives take a lot more work)

  1. Crop and white balance
  2. Invert R, G and B tonecurves
  3. Shift R, G and B tonecurve endpoints in order to get you neutral highlights and blacks
  4. If necessary: Change gamma values or bend curves until you get close to target.

Step 1


Crop image to remove borders,
white balance on brightest part of the negative

Step 2


R, G and B tonecurves have been inverted

Steps 3 and 4


R, G and B tonecurve endpoints shifted,
slight gamma change to G and B curves

Note how few settings needed a change.
Shot taken in 1978 with a Mamiya 645 and Sekor 80mm lens on Kodak Gold 400.
Image needs to be flipped horizontally because I shot the emulsion side.

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Thank you @Joanna & @platypus
I will give it a try during my next “negative” session.

Hopefully we can get some “help” from PhotoLab in the future ( @StevenL ?) to win some time and also have the cursor behaving normally and not reverse.

Hello dear negatives fans :grin:
Is there a reason not to invert « all » channels instead of R, G and B separately ?

I did invert the « all » channel, adjusted the WB and playing with SmartLighting and Clearview helps for contrast and light.

I found that inverting the coloured curves makes it easier to get the targeted colours in the image. Note that the main operations for removing colour casts etc. is in these curves. All other settings can be left as is or need only slight touches.

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Hello,
Thanks again for your inputs.
I was able to test and try a bit and it is “okay” to work with PL. But it is far from great.

I have a question… I have no experience with films and just trying to get the best results.
I know the film itself has grain.
Some of my pictures really look awful… and I guess it is the quality of the negative with combination of the photographer itself :sweat_smile:

Is someone in the mood to look at one of my raw file to give me a feedback ? I will share the file in PM only.