The invention provides, in some aspects, devices for image acquisition that use seals between concentrically disposed portions of an enclosure and an optics assembly in order to protect image acquisition components from the surrounding environment while providing adequate friction for both adjusting and locking focus. The invention further relates to medicaments containing these compounds and to a process for their preparation. A hub on the component orientation element acts to tune the component orientation element for attenuating vibration received by the component orientation element from the vehicle.