A crop conversion factor of 1.5 indicates that the smaller sensor is 1.5 times larger than the smaller sensor?

• A. It means the smaller sensor is 1.5 times larger than the smaller sensor.
• B. It means the full frame sensor is 1.5 times larger than the smaller sensor.
• C. It means the sensor size has no impact on focal length.
• D. It means the crop factor reduces the sensor size by half.

Answer: (B)

Crop factor compares your sensor to a standard reference, typically full-frame (35mm). A crop factor of 1.5 means the full-frame sensor is 1.5 times larger than the smaller sensor in linear size (its diagonal is 1.5 times longer). In practical terms, that’s why lenses on the smaller sensor give a field of view like using a longer focal length on full-frame—the crop sensor effectively “magnifies” the image. So the correct interpretation is that the full-frame sensor is 1.5 times larger than the smaller sensor.