Canon XF305 Weißbuch - Seite 3

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Interaxial separation is the distance

between the centers of two camera

lenses. The human interocular separation

is an important constant stereographers

use to make calculations for interaxial

separation. Beware that Interaxial

separation is often incorrectly referred to

as "Interocular" and vise-versa. In the

professional world of stereoscopic

cinema it has become the norm to refer

to interaxial separation as "i.o. " even

though it is the incorrect term.

Binocular Vision, Retinal Disparity and Parallax

Binocular Vision simply means that two eyes are used in the vision system.

Binocular Vision is very important to most mammals (including humans)

because it allows us to perceive depth at close range.

Try this: Hold one nger next to your ear. Now stretch your other arm out

straight and hold up another nger. Now bring your two ngers together

and touch the tips together. Is was easy right? Now repeat the same

procedure but close one eye. Were you able to touch your ngers

together on the rst try? Now you know how important binocular vision

is at close range.

When we look around at objects at diﬀerent distances from us the images

of those objects will be projected on our retinas in slightly diﬀerent

locations for each eye. Our brain can interpret this "Retinal Disparity" and

help us determine depth.

When we shoot 3D with two cameras from slightly diﬀerent positions the

same thing happens; each camera's sensor registers the objects in the

scene in slightly diﬀerent horizontal positions. We call this diﬀerence

"parallax. "

XF300/305 Whitepaper

Tim Dashwood

Interaxial Separation

Eyeballs converged

on center object

Stereoscopic 3D