Camera

-- Camera Settings --

Camera - Camera that has been set to render from.
Set Camera - Sets the selected Camera.
Aspect Ratio - Pixel aspect ratio.
Camera Type- Camera type for YafaRay to use.
Convert Camera -> YafaraCamera - converts a standard trueSpace camera to a YafaRay version.

- Perspective/Architect -

Aperture - Aperture size.
DOF - Depth of Field.
Type - Bokeh type.
Bias - Bokeh bias.
Rotation - Bokeh rotation.

- Orthographic -

Scale - Horizontal size of image plane.

- Angular -

Angle - Horizontal opening angle of the camera.
Max Angle - Maximum angle visible.
Circular - Blend out areas outside the Max Angle Circular Iris.
Mirrored - Mirror X-direction. Use for generating Light Probe images.

- Area Render -

Area Render - Enables Area Render. Used to render a portion of the view.
X Start - Left starting coordinate.
Y Start - Top starting coordinate.
Width - Width of view area to be rendered.
Height - Height of view area to be rendered.

-- Output Render File  

View - If enabled YafaRay will render the Workspace view
Camera - If enabled YafaRay will render the Camera view
Width - The width of the image rendered
Height - The height of the image rendered
> - File name for image output. This is where the rendered results will be saved 
Render - Exports XML file and spawns the YafaRay renderer

YafaRay Official Docs Camera