Camera settings: app.activeViewport.camera = ... not working

[dunderhead]

I thought this little trick would change my focal length (in Model environment) so that the angle of view becomes 90 degrees (I swear I had this working many months ago), but luck escapes me today when I fire the one liner  (here formatted for clarity) into the TEXT COMMANDS window:

   app = adsk.core.Application.get();

   view = app.activeViewport;

   camera = view.camera;

   camera.perspectiveAngle = 3.14/180 * 90;

   view.camera = camera

Nothing happens. Also, the value app.activeViewport.camera doesn't change but remains at .about 0.39 radians. Am I missing something?

thx

[frankzhang · Accepted solution]

Please check if your camera settings is perspective or not, if it is not perspective, the change won't take effective. Check out below image for reference.