In Lightbox large images are not centered horizontally but pushed up in the browser w

Large images in original size in Lightbox are not centered horizontally but pushed up in the browser window.
Example here, same height ( 700 px ) but different lengths.
centered
http://www.romeocolombo.com/SonyNex-7/Voigtlander-Nokton-50-mmF15/i-bhpRGhF/O
pushed up
http://www.romeocolombo.com/SonyNex-7/Voigtlander-Nokton-50-mmF15/i-Vhvt5wr/O
There is a solution?
Romeo
Example here, same height ( 700 px ) but different lengths.
centered
http://www.romeocolombo.com/SonyNex-7/Voigtlander-Nokton-50-mmF15/i-bhpRGhF/O
pushed up
http://www.romeocolombo.com/SonyNex-7/Voigtlander-Nokton-50-mmF15/i-Vhvt5wr/O
There is a solution?
Romeo
0