I made this photo of my grandson, shot as NEF, processed in LR4, and exported as the maximum size JPG. The only effects I apply on exporting are to "sharpen for screen". I noticed it looks slightly underexposed. When I put the NEF & JPG side by side in comparison view, the JPG looks noticeably darker.

The image below is pretty highly compressed for uploading here, but the exposure issue is the same in the maximum size JPG.

Has anyone else experienced this, in LR4 or other software?

working on it in Middle TN
Nikon D3100
18-55 mm Nikkor VR
55-200 mm Nikkor VR
55-300 mm Nikkor VR
150-500 mm Sigma OS

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Attachment #1, (jpg file)

The sages will pitch in here shortly, Diane, but in the meantime, I'll throw out an idea.

LR uses the ProPhoto Color Space. In addition to sharpening, you are also applying a conversion
to one of three color spaces: ProPhoto, AdobeRGB nd sRGB.

I have not experienced what you have using my settings, intentional or accidental.

You stripped off exif data so I can only guess.

~LarryC (eLCee)

Another bafflement. What happens to my exif data? I didn't take it off on purpose. Just did the LR export and uploaded directly to this site.

I'm using sRGB for export.

working on it in Middle TN
Nikon D3100
18-55 mm Nikkor VR
55-200 mm Nikkor VR
55-300 mm Nikkor VR
150-500 mm Sigma OS

Visit my Nikonians gallery.

When exporting, look over the export window and look for Metadata. Check to see if the box for minimize metadata is checked, if so that is your problem, un check it.

Oh... and as for your other issue, Larry could be right, I notice this on a very small percentage of images my self as I also use the Pro Photo color space through out my work flow. I always bring my exported images back into PS to adjust for web and the action I created to do this applies a levels adjustment that is +5 on the highlights because a smaller image IMO will always look a very small touch darker or dingy then it's larger version.

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Scott Martin Sternberg

Scotts Fine Art

Scott, I think you and Larry are probably right. The exposure shift issue only occurs on a few photos--mostly those with lots of light areas and bright colors. Just something to check occasionally.

I have all the metadata exported with my files when they are converted to JPG. When I look at the JPG images on my computer, right-click for Properties, Details--the metadata is there. It's getting removed somewhere in the upload process.

working on it in Middle TN
Nikon D3100
18-55 mm Nikkor VR
55-200 mm Nikkor VR
55-300 mm Nikkor VR
150-500 mm Sigma OS

Visit my Nikonians gallery.

"It's getting removed somewhere in the upload process"

That doesn't sound very likely. Unless your "upload process" in-tales something other they the standard upload feature at Nikonians. How are you uploading your images?

"I have all the metadata exported with my files when they are converted to JPG"

How are you exporting your images? Are you exporting from LR. You didn't answer my question as to the box being checked in the LR export window, is it checked or unchecked? Once you export the file are you doing anything else to the image before you are uploading it to Nikonians?

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Scott Martin Sternberg

Scotts Fine Art

I'm exporting from LR4. For most photos, I use the maximum size/quality jpg. For those to be uploaded to this site, I use the settings required to get the file size down.

On the list of metadata options in the export window, I have "all" checked.

I'm uploading the jpg directly to this site, using the normal "click here to choose your attachments" process.

Like I said, another bafflement.

working on it in Middle TN
Nikon D3100
18-55 mm Nikkor VR
55-200 mm Nikkor VR
55-300 mm Nikkor VR
150-500 mm Sigma OS

Visit my Nikonians gallery.

That does seem strange, it appears you have things setup properly. I will look into this more tonight if I get a chance. The only thing I can think of now is the quality setting you using, maybe it is striping some of the data. It really shouldn't though as you have "All" checked.

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Scott Martin Sternberg

Scotts Fine Art

Well, I tried changing the quality settings & the file size setting to all different sizes during exporting. Each time the image had the EXIF data intact.

So how about you export an image like you normally and right after you send it to me to have a look.

scott@motionpicturesphotography. com

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Scott Martin Sternberg

Scotts Fine Art

Scott--thanks for your help with this.

I just emailed the files to you.

It appears that the process of file size reduction is stripping the metadata.

I looked at the file I uploaded to this thread. Right click on the image, then Properties, Details--and all the exif and metadata is gone. The only info left is about the image dimensions and resolution. This file is 219 kB.

I also have a large jpg file exported at 100% quality. All of the exif and metadata is present. That file is 2.93 MB. It would be much bigger except for the fairly heavy cropping I did.

Don't know if this happens with other versions of LR or PS, I've never used them.

Are you exporting directly from LR? Or from PS?

working on it in Middle TN
Nikon D3100
18-55 mm Nikkor VR
55-200 mm Nikkor VR
55-300 mm Nikkor VR
150-500 mm Sigma OS

Visit my Nikonians gallery.

What are you using to view your jpeg??

Did you try re-importing it to LR and see how it looks then? Is you monitor calibrated? If so, how much of a shift does it show as a result of the calibration?

----
Dennis Smith.

>What are you using to view your jpeg??
>
>Did you try re-importing it to LR and see how it looks then?
>Is you monitor calibrated? If so, how much of a shift does it
>show as a result of the calibration?
>
>

Yes, my monitor is calibrated.

I was looking at the nef and the.jpg file in Lightroom, side by side. The jpg file image was definitely darker than the nef file image, that I exported to make the jpg.

working on it in Middle TN
Nikon D3100
18-55 mm Nikkor VR
55-200 mm Nikkor VR
55-300 mm Nikkor VR
150-500 mm Sigma OS

Visit my Nikonians gallery.

I was afraid the answer would be something like that

That makes it a bit disturbing!!

----
Dennis Smith.