1. What is Crop Factor?

Crop factor compares the imaging area of a camera sensor to a full-frame (35mm film) sensor. It affects field of view and effective focal length of lenses.

2. How Does the Calculator Work?

The calculator uses the crop factor formula:

Where:

• 43.27 — Diagonal size of full-frame sensor (mm)
• Diagonal Sensor Size — Your camera's sensor diagonal measurement (mm)

Explanation: The formula calculates how much smaller your sensor is compared to full-frame by comparing their diagonals.

3. Importance of Crop Factor

Details: Crop factor helps photographers understand the effective field of view of their lenses. A lens on a crop sensor camera will have a narrower field of view than on a full-frame camera.

4. Using the Calculator

Tips: Enter your camera's sensor diagonal size in millimeters. Common Canon APS-C sensors are about 26.7mm (1.6x crop factor).

5. Frequently Asked Questions (FAQ)

Q1: Why 43.27mm for full-frame?
A: This is the diagonal measurement of a 36×24mm sensor (standard 35mm film size).

Q2: What's Canon's typical crop factor?
A: Most Canon APS-C cameras have a 1.6x crop factor (26.7mm sensor diagonal).

Q3: Does crop factor affect image quality?
A: Not directly - it affects field of view. However, smaller sensors often have more noise at high ISOs.

Q4: How does this relate to focal length?
A: Multiply lens focal length by crop factor to get equivalent field of view (e.g., 50mm × 1.6 = 80mm equivalent).

Q5: Where can I find my sensor's diagonal size?
A: Check your camera's specifications or measure sensor width/height and use Pythagorean theorem.