A couple more 'Deep Stereo' images using Tri-shots.

tony brown wrote:

threed123 wrote:

Please refresh our memories of this process?

Basically, I am taking a standard stereo pair with 90mm lens separation, then taking a further third shot typically 1metre to the right side of the first pair and at the same distant target.

Then this third image is masked, in a layered software like Photodhop, with the second (i.e. right-hand) image. The result uses the normal stereo pair for the foreground to approximately 30 metres and the third image from there to the backgound to extend the discrimination of distant objects.

In my case, the single left image of the standard stereo pair remains unaltered throughout and it is only the two right hand images which are masked together, using whichever is required in different parts of the picture.

Effectively, the standard, close lens stereo provides depth discrimination for several metres and then the remainder of the landscape becomes like a flat theatre backdrop. The approach outined is only applicable to subjects with large depth range. Just using wide spaced lens capture devices for two shots only, creates close foregrounds too separate for the eyes to reconcile them together. (Unlike the stone wall in my first example above.)

Have only been playing with stereo in the last two years and find it interesting, challenging and fun in my late retirement years, albeit 170 years after the introduction of stereo photography.

Interesting I idea. If you were to simply take two images far apart, you would end up with miniaturization, but this way, the 3D image "feels" normal with more depth. I will have to try that, thanks, Tony.