Nikon D810 NEF and DNG files have tonal differences !

I converted D810 NEF files to DNG and discovered that the histograms of the two (unedited) files do not agree.  Here are the Photoshop histograms; the left is the original NEF file, the right is the converted DNG.  Any explanation ?

Nikon D810 DNG and NEF Histograms.jpg

Topics

DNG
View all replies

Views

550

Likes

Translate

Translate

Report

Report
More
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn More

Nikon D810 NEF and DNG files have tonal differences !

I converted D810 NEF files to DNG and discovered that the histograms of the two (unedited) files do not agree.  Here are the Photoshop histograms; the left is the original NEF file, the right is the converted DNG.  Any explanation ?

Nikon D810 DNG and NEF Histograms.jpg

Topics

DNG
View all replies

Views

551

Likes

Translate

Translate

Report

Report
More
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn More
Correct Answer by ssprengel
Adobe Community Professional, Mar 26, 2018
Correct Answer by ssprengel
Adobe Community Professional, Mar 26, 2018

Canon has a raw converter with proprietary methods and parameters.  Adobe has a raw converter with proprietary methods and parameters.  Canon and Adobe are distinct corporations with technology the other has no idea about, so any settings you have from Canon aren't applicable to Adobe and vice versa.  Each software starts with the raw sensor data and does it's own thing, and while some settings are named the same, they won't operate the same, internally, at least not exactly.  Adobe attempts to simulate some of the picture styles but it's an approximation at best.

If you want to use Adobe software don't expect it to know anything about any Canon settings.

5 Replies

Re: Nikon D810 NEF and DNG files have tonal differences !

Adobe Community Professional, Mar 25, 2018

You are viewing the histogram in Photoshop and as such the file has been converted from raw to RGB using some color space in the Camera Raw plug-in, and this is where there is likely some difference in toning settings, lens-correction vignetting, or camera profile, so check those and see what's different.

View all replies

Likes

Translate

Translate

Report

Report
More
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn More
Reply
Loading...

Re: Nikon D810 NEF and DNG files have tonal differences !

You are correct.  After doing some research, however, I have a more in-depth question, regarding in-camera profiles (in the case of Canon, 'Picture Styles') vs. Adobe Camera Profiles.

I can use Canon in-camera Picture Styles to modify the tonal quality of RAW images, as evidenced by comparisons in the Canon Digital Photo Professional software.  However, when loaded into Adobe Camera Raw, the Picture Style is automatically over-ridden by the Camera Profile selected in the Camera Calibration tab.

In the case of RAW files with XMP side-cars, one can recover the original in-camera profile by simply renaming or deleting the XMP file.  But, in the case of DNG files, it appears that the in-camera profile is gone for good (unless one embeds the RAW file in the DNG?).

If one goes to so much trouble of creating and/or selecting an in-camera profile, why doesn't Adobe offer the option of retaining and using that profile in Camera RAW?

Unless one is creating in-camera JPG's which aren't going to have further editing, it appears that it makes no difference which in-camera profile is used, since it will be over-ridden once it is loaded into Camera Raw.

View all replies

Likes

Translate

Translate

Report

Report
More
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn More
Reply
Loading...

Re: Nikon D810 NEF and DNG files have tonal differences !

Correct Answer by ssprengel
Adobe Community Professional, Mar 26, 2018

Canon has a raw converter with proprietary methods and parameters.  Adobe has a raw converter with proprietary methods and parameters.  Canon and Adobe are distinct corporations with technology the other has no idea about, so any settings you have from Canon aren't applicable to Adobe and vice versa.  Each software starts with the raw sensor data and does it's own thing, and while some settings are named the same, they won't operate the same, internally, at least not exactly.  Adobe attempts to simulate some of the picture styles but it's an approximation at best.

If you want to use Adobe software don't expect it to know anything about any Canon settings.

View all replies

Likes

Translate

Translate

Report

Report
More
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn More
Reply
Loading...

Re: Nikon D810 NEF and DNG files have tonal differences !

Humm...I think Canon RAW (CR2) is proprietary also, but it doesn't stop Adobe from supporting it.

The least they could do is support the Canon Camera Profiles also.

View all replies

Likes

Translate

Translate

Report

Report
More
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn More
Reply
Loading...

Re: Nikon D810 NEF and DNG files have tonal differences !

Adobe Community Professional, Mar 27, 2018

The raw sensor data is not hidden and there is a raw-file-format specification for CR2 files that is documented as far as where to find the image data in the CR2 file.  What is hidden and unknown, and therefore proprietary, is what a manufacturer's computer program, either on a computer, or in the camera does with the raw data to produce a visible image, like a JPG.

Canon camera profiles are information for the Canon raw converter, on the computer or in the camera, that tells it what to do with the raw data.  Since Adobe doesn't know what the internals of Canon's raw converter are, they cannot use the Canon camera profile.

View all replies

Likes

Translate

Translate

Report

Report
More
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn More
Reply
Loading...