What Is the Correct Method of Calibrating the Zoom Lens

question 2

Multiple Choice

What is the correct method of calibrating the zoom lens to keep it in focus throughout the zoom?

• A) zooming the lens all the way out and focusing on the background before zooming back in again
• B) zooming the lens all the way out and focusing on the principal subject before zooming back in again
• C) zooming the lens to the normal focal length and focusing on the principal subject
• D) zooming the lens all the way in and focusing on the test chart before zooming back out again
• E) zooming the lens all the way in and focusing on the principal subject before zooming back out again

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