Full Frame and Crop Sensor Focal Length Converter

How to Use This Calculator

1. Enter the focal length of your lens in millimeters (mm).
2. Select whether your camera has a full-frame sensor or a crop sensor.
3. Enter the crop factor of your camera (default is 1.5 for APS-C sensors, but varies by camera model).
4. Click the "Calculate" button to see the equivalent focal lengths.

Why Use This Calculator?

When comparing lenses between cameras with different sensor sizes, the actual field of view changes even if the focal length is the same. This calculator helps you understand how a lens will perform on different camera systems by showing you the equivalent focal length.

Understanding Crop Factors

Crop factors are determined by the size of a camera's sensor compared to a full-frame sensor. Common crop factors include:

• 1.0x: Full-frame cameras
• 1.5x: APS-C sensors (common in Canon DSLRs)
• 1.6x: APS-C sensors (common in Nikon, Sony, and most mirrorless systems)
• 1.6x: Four Thirds system (Olympus and Panasonic)
• 2.0x: Micro Four Thirds system (some Olympus and Panasonic mirrorless cameras)

Example Usage

Suppose you have a 50mm lens on a crop sensor camera with a 1.6x crop factor. The equivalent full-frame focal length would be:

50mm × 1.6 = 80mm

This means that a 50mm lens on your crop sensor camera will have the same field of view as a 80mm lens on a full-frame camera.