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Why does a 3D camera show up where it does?

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Hans CastropWhy does a 3D camera show up where it does?
by on Feb 19, 2013 at 10:27:52 am

Does anyone know why a camera defaults to a certain position in (Z)space when creating? It never pops up at 0 but always in front of that. I'm using stereoscopic scenes and want the camera to look at objects away in z space. I always have to substract camera distance from distance of 3D objects to set camera to object distance.


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Vishesh AroraRe: Why does a 3D camera show up where it does?
by on Feb 19, 2013 at 2:17:07 pm

Does anyone know why a camera defaults to a certain position in (Z)space when creating?

From Adobe :

In After Effects, the position of the camera represents the center of the lens. When you modify Focal Length, the Zoom value changes to match the perspective of a real camera. In addition, the Preset, Angle Of View, and Aperture values change accordingly.


If you double click on the camera to open Camera Settings, you will notice that the z-Position is equal to( negative of )Focus Distance.

Vishesh Arora
3D and Motion Graphics Artist
Films Rajendra

Blog:
http://digieffects.wordpress.com

2011 3D Demo Reel:








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Hans CastropRe: Why does a 3D camera show up where it does?
by on Feb 19, 2013 at 3:52:30 pm

especcially your addition gives me some extra insight.
Thank you.


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Vishesh AroraRe: Why does a 3D camera show up where it does?
by on Feb 19, 2013 at 4:24:17 pm

Always glad to help :)

Vishesh Arora
3D and Motion Graphics Artist
Films Rajendra

Blog:
http://digieffects.wordpress.com

2011 3D Demo Reel:








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Darby EdelenRe: Why does a 3D camera show up where it does?
by on Feb 23, 2013 at 8:55:49 am

[Vishesh Arora] "If you double click on the camera to open Camera Settings, you will notice that the z-Position is equal to( negative of )Focus Distance."

Just a quick not of clarification: it's actually set to the -zoom value rather than the focus distance.

These are often locked together in the camera dialog.

Darby Edelen


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Hans CastropRe: Why does a 3D camera show up where it does?
by on Feb 23, 2013 at 9:05:06 am

Thanks Darby for finetuning.

Hans.


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Vishesh AroraRe: Why does a 3D camera show up where it does?
by on Feb 23, 2013 at 9:52:31 am

Darby

it's actually set to the -zoom value rather than the focus distance.

The zoom is just as the Focal Distance in CS3.

Well thanks for clarification. I checked in CS6, focal distance option has been removed.

Vishesh Arora
3D and Motion Graphics Artist
Films Rajendra

Blog:
http://digieffects.wordpress.com

2011 3D Demo Reel:








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