Certified Professional Photographer (CPP) Practice Exam

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A full-frame sensor's size is equivalent to what traditional film format?

  1. 120mm

  2. 35mm

  3. 16mm

  4. 4x5 inches

The correct answer is: 35mm

A full-frame sensor in digital photography is equivalent to the 35mm film format, which measures 36mm x 24mm. This format has been the standard for many years in both film and digital photography, making it familiar to photographers around the world. The full-frame sensor captures images at this same size, ensuring that photographers can retain the depth of field and field of view that they would expect from traditional 35mm film cameras. In contrast, other sizes mentioned—such as 120mm, which refers to medium format film, 16mm, which is used primarily for cinema, and 4x5 inches, which corresponds to large format photography—are distinctly different in dimensions and applications. Thus, 35mm is recognized as the correct match for a full-frame digital sensor size.

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