Depth of Field Calculator｜Interactive DOF & Bokeh Visualizer

This interactive tool helps photographers and videographers calculate and visualize a camera's depth of field (DOF). Instantly see how changes in sensor size, aperture, focal length, and distance affect your focus range and background blur, making it easy to plan your perfect shot.

💡 Tool Overview

• Interactive Visualization: Provides a clear, real-time graph showing the sharp focus area, the subject's position, and the camera, helping you intuitively understand the results.
• Complete Camera Controls: Adjust all key parameters that influence depth of field: sensor size (Full-Frame, APS-C, Micro Four Thirds), focal length (10-600mm), f-stop (f/1.0-f/22), and subject distance.
• Essential Calculations: Instantly computes the total depth of field, near/far focus limits, and the hyperfocal distance—all critical metrics for creative and technical photography.
• Real-time Feedback: All calculations and the visualizer update instantly as you move the sliders, allowing for quick experimentation to achieve your desired look, from creamy bokeh to deep, sharp landscapes.

🧐 Frequently Asked Questions

Q. What is "Hyperfocal Distance"?

A. Hyperfocal distance is the closest point you can focus your lens on while keeping subjects at "infinity" acceptably sharp. Focusing at this specific distance maximizes your depth of field, which is a very common technique in landscape photography to ensure everything from the foreground to the distant mountains is in focus.

Q. How can I achieve a more blurred background (stronger bokeh)?

A. To increase background blur and create a shallower depth of field, you can: 1. Use a wider aperture (a smaller f-number, like f/1.8). 2. Use a longer focal length (e.g., 85mm instead of 35mm). 3. Move closer to your subject. 4. Increase the distance between your subject and the background. You can experiment with all these variables in the simulator to see their effect.

📚 Understanding Depth of Field: The "Circle of Confusion"

The calculations for depth of field rely on a concept called the "Circle of Confusion" (CoC). It refers to the maximum size a point of light can be on the camera's sensor before our eyes perceive it as a blur rather than a sharp point. This value is a key factor in why different sensor sizes produce different depths of field with the same lens settings. Larger sensors, like Full Frame, have a larger acceptable Circle of Confusion, which contributes to their characteristic shallower depth of field compared to smaller sensors like APS-C or Micro Four Thirds. This tool automatically uses the correct CoC value when you select a sensor size.