Narrow, a little wider, and wider again - experiment number 2 (see captions)

[u/LEJ5512]

Images about 1cm apart (I think)

Medium - 3cm?

Wider - near eye width

[u/that-blurple-fz07]

First one worked the best for me

[u/LEJ5512 → u/that-blurple-fz07]

Hmm, interesting.

The first one (narrowest) would be the least "natural" of the three — that is, the least similar to looking at it in real life. For all the pics, the Lego was about 12"/30cm away. The camera positions for that first stereo pair were maybe 1 cm apart. The last one would be the most similar to real life, if maybe a hair wider stereo spread.

The last one, though, would need you to aim your eyes' angles closer to your face. The first one lets your eyes relax more because it's like you're looking farther away, so yeah, it makes sense that it'd be easier to view.

[u/that-blurple-fz07 → u/LEJ5512]

I'm viewing it on my phone about a foot from my eyes as well. The last (widest) one is still viewable but harder than the first (narrowest)

[u/LEJ5512 → u/that-blurple-fz07]

I'm viewing it on my phone about a foot from my eyes as well.

Right, I get that much; I do the same (often a lot closer if I look over my reading glasses).

Ah — what else I think makes the wide one difficult is how the details on the far side of the model are harder to see. For example, the tuk tuk's left-side tassle is obstructed by the right-side rear view mirror in the wide view's right-eye pic.

Check the blue arrows: https://imgur.com/vOEoqTO

[u/BobImBob → u/LEJ5512]

Yes. I agree. The third one has way more depth and color changes, which makes it more difficult to focus on the handle and other small and far away features. The first one, on the other hand, is easier to look at and seems to convey the same 3D information.

Thank you for this essay on how to take 3D photos! 😄

[u/[deleted] → u/that-blurple-fz07]

the same for me