export problem

Community Beginner ,
Dec 07, 2020 Dec 07, 2020

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I noticed this very strange thing happening in Lightroom Classic (v10) when I export.

 

I have two files, the same photo:

1st is a .NEF with some adjustments on.

2nd .PSD is that NEF, exported to photoshop to add a layer to edit out a reflection on a window. 

 

I export both files from LR as JPGS, same crop, same parameters. The first is 900Kb, the second only 200Kb.

So it looks like I'm losing more than half of my file somewhere, where is the problem?

 

 

 

 

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Community Beginner ,
Dec 07, 2020 Dec 07, 2020

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I made some more tests: this only happens when I check the "resize to fit" to a "width & height".

It is a bug I think, the PSD loses 3/4 of its resolution compared to the NEF

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LEGEND ,
Dec 07, 2020 Dec 07, 2020

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Resolution is not measured by file size. These are independent. One does not imply the other.

 

JPGs sizes can vary widely, depending on a lot of factors that you cannot control, and this does not indicate any bug or problem.

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Community Beginner ,
Dec 07, 2020 Dec 07, 2020

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thank you, but beside the file size it looks also really bad compared to the other one

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LEGEND ,
Dec 07, 2020 Dec 07, 2020

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but beside the file size it looks also really bad compared to the other one

 

Naturally, this depends on the settings you choose in the Export dialog box. We would need to see those settings and the original image and the exported image, we can't advise further.

 

But I agree with @Just Shoot Me , this is not a bug, this is a case where the user has selected the wrong settings.

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LEGEND ,
Dec 07, 2020 Dec 07, 2020

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No it is Not a Bug. It is the Settings "You" have chosen in the Export Dialog Window.

 

Show us a screen shot of the Full Export dialog window with all the setting you normally use, including the Resize to Fit.

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Community Beginner ,
Dec 07, 2020 Dec 07, 2020

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thank you.

 

.NEF is 4912x7360 pixel

.PSD is the same

 

I crop in Lightroom both files to 1903x797 (strange resolution I know but it is needed for an app).

I export from Lightroom both files to Jpg at 80 and 1903x797 pixels.

 

Screenshot 2020-12-07 at 16.48.36.png

 

the first one is exported as a good looking 1Mb jpg, the second one is a 200Kb.

If I export without the crop files look similar and size is almost the same.

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LEGEND ,
Dec 07, 2020 Dec 07, 2020

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For what reason are you Resizing To Fit. that is why you are getting really low File Size. And that you have the PPI set to 72. Se the PPI to 300 and test. Also if you can, it looks Greyed out, set the quality to 100.

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Community Beginner ,
Dec 07, 2020 Dec 07, 2020

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Thank you, you are very kind but I think I'm not able to explain myself very well.

The problem is that with the same parameters the .NEF is exported correctly, the .PSD is not 

 

It looks like Lightroom handles differently the cropping of .NEF and .PSD, the same photo is generating two very different output files. 

 

 

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LEGEND ,
Dec 07, 2020 Dec 07, 2020

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Different in what way? Can you show us? What are the pixel dimensions of both exports? The PSD has had some editing done to it that the NEF didn't have, that can also make a big difference.

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Community Beginner ,
Dec 07, 2020 Dec 07, 2020

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thank you, pixel dimensions are the same. I'm exporting with exactly the same parameters (jpg 1903x797 pixels at 72ppi 80 quality)
the first file in the screenshot is from the NEF, the second one is from the PSD

 

Screenshot 2020-12-07 at 17.57.38.png

 

 

I have now tried to replicate this with another photo and for some reason it was impossible. So I don't know, it might depend on something on this particular image. Thank you very much for your help

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LEGEND ,
Dec 07, 2020 Dec 07, 2020

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Ok we asked for the Full Export window screen shot. You showed us 2 sections.

We asked to see the image difference that you are seeing on your screen, Screen shot of that. you posted nothing.

Best of luck to you. I have to Go Now.

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