Camera control

Hi guys!
Have a stupid question. I have couple of cameras, i need to switch beetwen them and rotate around objects. Switching i’ve done(by set view target with blend), but cant control them. Help me please =)

Use spring arm, with a tiny bit of lag (so it events out stuttering).
Then you can rotate arm and change its length.
Or simply change location and rotation of camera, but that has annoying stuttering.