Svetlana

Vladimir,

Your picture is fine except that it is underexposed.  I am uploading a histogram to show you what it looks like.   Many cameras show histograms and so does Photoshop.  It looks like a bar graph with the dark values in your photographs shown on the left and the bright values on the right.  Notice that your graph does not extend to the right.  That shows that you are underexposed.

You can also see that the white garment is not white; there are no right-hand white pixels to make it that way.

Regards,

Jerry