2017

Table Of Contents
The object's size in the frame is directly proportional to the focal length. If you double the focal length
(keeping the distance from the camera to the object constant), the subject appears twice as large in the frame.
The size of the object in the frame is inversely proportional to the object's distance from the camera. If you
double the distance, you reduce the size of the object by half in the frame.
Adjusting the Angle of View
To adjust the angle of view:
1 From the Camera menu, ensure that the Basics tab is active.
2 If you are using degrees for angle of view, enter the value directly in the FOV field.
Increasing the FOV value widens the frustum and decreases the Focal Length. Decreasing the FOV
value narrows the frustum and increases the Focal Length.
Importing and Exporting 3D Cameras
Smoke supports the import of Alembic 3D data, and the import and export of 3D data saved in the FBX 3D
format. These formats provide a means for exchanging 3D data for scene compositionssuch as
camerasbetween tools and packages developed by different manufacturers.
You can either import a camera you created and edited in Action, or import one from another 3D application.
Once a camera is imported, you can edit its parameters, change its animation, and then export it back to
the application it came from.
NOTE Some parameters in Maya are not supported in FBX, such as Shear, FilmPostScale, and CamScale. Also,
many parameters that are animatable in Maya and Smoke are not supported as animation curves in FBX. The 3D
Camera does not support depth of field.
Export a 3D camera from Action to FBX format, which can be used later by any other FBX-compatible
application.
To export a 3D camera from Action to FBX format:
1 Select the camera that you want to export.
2 In the 3D Camera menu, click Export.
The Export Camera file browser appears.
642 | Chapter 15 Compositing in 3D Space with Action