Camera and clipping trouble (Film and Stage plugin)

I'm not sure why the bounds are so large either

But I'd fix it like this...
View > Hidden Geometry > ON.
Edit the camera component.
Edit > Select_All
Hold Shift+Ctrl and select the camera only left right so it is 'deselected'.
Press delete key to erase everything else inside the camera component...
Exit exit mode.
View > Hidden Geometry > OFF.
The camera now has a much reduced bounding-box that includes just its geometry...

A component is something just like a group (from this point of view). A collection of geometry separated from other geometry.

Draw a box, triple click on it (to select all) then right click on the selection and there are two menu items (among others): make group or make component.

Anyway, either of them you make, there will be a bounding box around it. With a simple box shape, this bounding box will ideally follow the edges.

With your cameras, there must have been some stray geometry included as their bounding boxes were extremely huge.

Now to edit a group or component, simply double click on it. To select all (what TIG did), press Ctrl+A (on Windows - I am not sure what the default is on Mac, maybe Option+A?). Now to deselect the camera, use the select tool and pull a selection box around it while holding the Ctrl (Option?) and Shift keys down (beside the select tool, there will be a - sign). If you do this, the camera will not be selected but everything else (including that mysterious geometry) will still be. Now press the Delete button to get rid of this ghost selection.

Click anywhere outside the component to get out of its editing context.

You need to enterthose groups (components?). Double click some of the visible geometry to enter the editing context.

You do not delete the bounding box - every group or component has that box around.

Just delete whatever (mysterious geometry) is inside - except the camera itself. So once inside, select all > deselect the camera > delete whatever is left in the selection.

Then exit the group/component and see that bounding box suddenly shrink to human size.

Well, it was TIG who proceeded that way (I only believed him as usually).

I guess I'll have to look into it again.

Vegard

I've looked into this a bit more for you...

It's not that straightforward BUT it is fixable...

There are two other hidden groups inside the camera's group, they are called 'frustrum_rays' [several guide-line rays along th edges of the view 'box'] and 'frustrum_faces' [the planes that make up the camera's view 'box']
These are on both on their own layers that are switched 'OFF'.
Use the 'Layer Browser' to switch them 'ON' and you'll see what I mean.
Select both of these layers in the Browser and use the '-' button to delete them - using the option to delete the layer's contents - this will remove the two groups.
See this screenshot...

OK guys, I did not sleep last night. Leaving now...

@vbergheim said:

Can't believe it... That simple. I knew about those all the time, but not that they were causing all the trouble.
Thanks a lot to both you! Really appreciate it. I can finally continue...

Im sure I will return to this place...

Sorry it took so long for 'the penny to drop'... as it were...