focus
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focus
The center of interest, attention, or an activity; the main emphasis.
Der Focus dieser Konferenz liegt auf den neuesten Entwicklungen der künstlichen Intelligenz.
The focus of this conference is on the latest developments in artificial intelligence.
Alongside the spelling 'Focus', the Germanized variant 'Fokus' is very common today and is often preferred. Both spellings are correct and have the same meaning and the same article, 'der'.
Der Fokus unserer Arbeit liegt auf der Kundenzufriedenheit.
The focus of our work is on customer satisfaction.
In the meaning 'Schwerpunkt' (main emphasis), 'Focus' is almost always used with the preposition 'auf'. To describe an action, you use the accusative: 'den Focus auf etwas legen' (to put the focus on something). To describe a state, you use the dative: 'Der Focus liegt auf etwas' (the focus is on something).
Legen Sie den Focus auf die wichtigsten Aufgaben.
Put the focus on the most important tasks.
The meaning is usually easy to recognize. If it is about topics, attention, or priorities, 'Schwerpunkt' (main emphasis) is meant. In texts about photography, physics, or optics, 'Brennpunkt' (focal point) is meant.
Der Focus der Kamera war nicht richtig eingestellt.
The camera's focus was not set correctly.
center
'das Zentrum' and 'der Focus' can both mean the most important point. 'das Zentrum' can be a real center, for example in a city or on a surface. But it can also figuratively be the most important point of a topic. 'der Focus' mainly refers to the attention or main emphasis of a piece of work, a conversation, or a plan. The words can be confused when something is about importance. 'Im Zentrum stehen' (to be central / to be at the center) sounds more natural when something is at the center of attention. 'Der Focus liegt auf ...' (the focus is on ...) fits better when you want to say what you are concentrating on especially.
Bei dem Kurs liegt der Focus auf einfachen Gesprächen im Alltag.
In the course, the focus is on simple everyday conversations.
Im Zentrum der Diskussion stand die Frage, wie die Mieten sinken können.
At the center of the discussion was the question of how rents could be lowered.