dark thumbnails of RAW format pictures taken with Samsung NX

[Zdenek Vit]

Hello,
I have a problem with XNVIEWMP Version 0.68 (May 19 2014), Libformat version 6.58
Please explain very dark thumbnails of RAW format pictures taken with Samsung NX300. The converted JPG (by Zoner v.15 editor/convertor) are OK.
When raw file (*.SRW) is passed to PS CS6 via Camera Raw v8.2, the exposition of the picture is also OK.
Note:
The problem is being solved by Pierre-e Gougelet <!--// removed* //-->

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[xnview]

do you use Settings>View>Camera us => Embedded preview?

[Zdenek Vit]

Yese, I use Embedded preview, see attachment.
It is interessing that thumbnail is dark but XNVIEW preview is OK, see attachment.

[xnview]

Try to rebuild thumbnails

[Zdenek Vit]

Hello, no change. Still dark. I lost previous files, so I send a new ones.

[xnview]

i don't undertsand i have no problem with the one that you sent to me...

[XnTriq]

Is Use gamma correction (Tools » Settings... » View) activated?

[Zdenek Vit]

Hi Pierre,
sorry beeing out for a time.
About gamma correction; I don't prefer gamma correction. Even when I try it doesn't help.
What else can cause that problem? Wne I use Adobe Camera RAW latest version (8.5), the picture shows proper exposition. XNview doesn't. ...I don't want to give up, the rest of XNview is excelent.