How to Use This Calculator
- Enter the actual focal length of your camera lens in millimeters (mm).
- Select the sensor type you want to calculate from:
- Full Frame - If you want to know what your current focal length would be on a full-frame camera
- Crop Sensor - If you want to know what your current focal length would be on a crop sensor camera
- Both - To see both full-frame and crop equivalent focal lengths
- Enter the crop factor of your camera's sensor (common values include:
- 1.5x - Most APS-C cameras (Nikon, Sony, Pentax, some Canon)
- 1.6x - Canon APS-C cameras
- 1.6x - Most mirrorless cameras with APS-C sensors
- 2x - Four Thirds cameras (Olympus, Panasonic)
- Click the "Calculate" button to see the results.
Why Use This Calculator?
Understanding equivalent focal lengths is essential when upgrading cameras or lenses between full-frame and crop sensor systems.
A 50mm lens on a full-frame camera has a different field of view than a 50mm lens on an APS-C camera with a 1.5x crop factor.
This calculator helps you determine what focal length you'd need on a different camera system to achieve similar composition.
Example Use Cases
- Determining if your current lenses will be suitable when switching camera systems
- Comparing lens specifications across different camera brands and formats
- Planning compositions when using lenses between different sensor sizes
- Understanding why a lens appears more or less zoomed on different camera systems