1. What is Focal Length Conversion?

Focal length conversion calculates the equivalent focal length when switching between different camera sensor sizes or formats. It helps photographers understand how lens performance translates across different equipment.

2. How Does the Calculator Work?

The calculator uses the focal length conversion formula:

Where:

• \( FL_{old} \) — Original focal length (mm)
• \( Factor \) — Conversion factor (dimensionless)
• \( FL_{new} \) — Converted focal length (mm)

Explanation: The conversion factor represents the ratio between the sensor sizes or formats being compared.

3. Importance of Focal Length Conversion

Details: Accurate focal length conversion is essential for photographers when switching camera systems, comparing lens performance across formats, or planning shots with different equipment.

4. Using the Calculator

Tips: Enter the original focal length in millimeters and the conversion factor. Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical conversion factor for crop sensors?
A: Common conversion factors are 1.5x for APS-C Nikon cameras and 1.6x for APS-C Canon cameras.

Q2: Why is focal length conversion necessary?
A: Different sensor sizes affect the field of view. Conversion helps maintain consistent framing when switching between formats.

Q3: Does conversion affect aperture?
A: Focal length conversion doesn't change the actual aperture, but it may affect the equivalent depth of field.

Q4: Can I use this for medium format conversions?
A: Yes, the same formula applies. You'll need the appropriate conversion factor for the specific medium format system.

Q5: Is image quality affected by conversion?
A: The conversion itself doesn't affect image quality, but different sensor sizes and lens designs will produce different results.