Close Up Vigana What's The Difference Between "close-up" And A "headshot"?

What's the difference between "close-up" and a "headshot"? - close up vigana

I need to make a portfolio with different types of portraits. Some were in the head, which I assume they also shot an actor. Several other must be "big shots. Share request additional instructions, is not an option. How far should I assume they want to take? The final shot in the head, on average, against a kind of" close-up, or even beyond but still close because no complete organism?