Certified Professional Photographer (CPP) Practice Exam

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Which focal length would a typical 2x teleconverter create when used with a 200mm lens?

  1. 400mm

  2. 600mm

  3. 250mm

  4. 300mm

The correct answer is: 400mm

When a 2x teleconverter is used with a 200mm lens, it effectively doubles the focal length of the lens. This means that the new focal length after attaching the teleconverter would be calculated as follows: 200mm (original lens focal length) x 2 (magnification factor of the teleconverter) = 400mm. Therefore, the focal length created by the combination of a 200mm lens and a 2x teleconverter is indeed 400mm, making this option the correct choice. It’s important to remember that teleconverters alter the effective focal length of a lens, which can significantly affect the composition and approach to photographing subjects, particularly in types of photography where distance from the subject is crucial, such as wildlife or sports photography.

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