I could hold of for a few seconds, but my eyes kept rejecting the image. It's like they somehow knew that they were more than the usual spacing apart (if that matters, for stereoscopic images?)
Mine gets better at arm's length on my phone, but my visual focal distances are funky because I have 3 dipoters of difference between my corrective lenses. All I can suggest is "try moving back and forth and see what works."
nope it doesn't matter. It is known to cause motion sickness in VR, but as for viewing photos, any amount of separation works as long as the subject and details have a relatively narrow angle opposing each other all the way from the bottom to the top. The very close waves for example are probably simply too far apart compared to the waves in the background, but everything else is great in this set of photos.
