фокусировка; наводка на резкость
focusing by diffraction — дифракционная фокусировка
- alternating-gradient focusing
- automatic focusing
- ballistic focusing
- beam focusing
- center focusing
- direct focusing
- dynamic focusing
- electromagnetic focusing
- electrostatic focusing
- gas focusing
- image focusing
- ionic focusing
- isoelectric focusing
- magnetic focusing
- over-or-under focusing
- periodic permanent-magnet focusing
- permanent-magnet focusing
- phase focusing
- rack-and-pinion focusing
- range finder focusing
- reflex focusing
- scale focusing
- secondary focusing
- solenoid focusing
- space-charge focusing
- through-the-lens focusing