Nikon Z6 built-in lens profile by default - Big distorsion and big vignetting

Ok I have done a test with some Nikon Z6 files with the Nikor Z 50mm f/1.8S this is what I get with one of the files. The builtin lens profile is applied and if I select Enable lens profile corrections it just indicates builtin profile. If I select custom the Nikor AF-S 50mm f/1.8 S profile gets selected. There is no Nikor Z 50mm lens profile in the list of Adobe Profiles available for Nikon.

See the screen capture. The is a difference in the lighting but little or no distortion correction for either lens.

It certainly looks that two profiles are applied. See the screen capture.

I don't own your particular lens but I looked for some 50mm shots with straight lines in it and here is a shot taken with a AFS 50mm F/1.8 on the FTZ adapator on my Z7. The shot was at f/1.8. I drew some straight lines (in red) to show that using just the built-in profile the distortion is completely corrected and when I enable the profile corrections, which auto selects the correct lens, There is over correction making the straight lines bow inwards which you can see from them peeking under the straight lines. Also the vignette correction is way overdone and appears to brighten the entire image. The "built-in" profile image is corrected correctly in my opinion. If I show you shots done at 14 mm using my 14-24 mm lens it is way more obvious that the built-in profile corrects all distortion and that selecting the profile corrections overcorrects the image but since this is virtually the same lens as yours I thought this was an appropriate illustration. Also, if I open in Nikon Capture and make sure the lens corrections and vignette corrections are enabled, the image is the same as using just the built-in profile. Unselecting the lens corrections makes the horizontal lines bow upwards in the middle as you expect as the uncorrected image should have slight barrel distortion. 

AF-S lenses are automatically distortion corrected by the built-in profile on the Z-series. In fact you can't turn this off. When you manually select the lens, you will get double correction. I have extensively tested this and whether you have Z lenses or AF/S lenses, Lightroom applies distortion correction to files from Z cameras using the built-in profiles. My guess is that the first image is already corrected just fine for distortion although of course the 50 f/1.8 has barely any distortion to start with. It might be that the vignetting correction Nikon embeds in the raw file is not very aggressive and it might actually react to the in-camera settings on vignetting correction which is why you see some effect on vignetting.

I think the explanation is simple. Z-lenses have built-in profiles, but you used an AF-S lens which is a DSLR lens (via an adapter, I assume). DSLR lenses do not have a built-in lens profile, and so you needed to apply one. The fact that Lightroom said that a built-in profile was applied is probably because it does say so automatically for this camera, or because the adapter suggests that.

So people don't have to download the image you have attached to your post please Edit your post to remove the Attached screen shot and Include it in the body of the text of your post.

You do that by Clicking the "More..." link at the bottom of your post, Selecting "Edit Message" and then use the "Insert Photos" icon in the tool bar at the top of the Post/Reply/Edit dialog box like this.


Thank you.