Completely blocking the image information page to mobile user agents is completely unnecessary. I'd much rather look at your non optimized page than be told to come back on desktop.
Moreover, even after switching to desktop mode on my phone, there's nothing I see that precludes you from employing a little bit of CSS to make those pages render more nicely on mobile screens.
Moreover, even after switching to desktop mode on my phone, there's nothing I see that precludes you from employing a little bit of CSS to make those pages render more nicely on mobile screens.