Adjust Camera Focal Length and Depth of Field in Blender

Controlling your virtual camera is essential for creating realistic or stylized renders in Blender. This guide provides a straightforward walkthrough on how to locate and adjust both the camera’s focal length and depth of field (DoF) settings to achieve professional-looking focus and composition in your 3D scenes.

How to Adjust Camera Focal Length

Focal length determines the field of view and perspective distortion of your camera. Lower values produce a wide-angle effect, while higher values zoom in and compress the scene.

  1. Select the Camera: Click on your camera in the 3D Viewport or select it from the Outliner on the top right.
  2. Access Camera Properties: Navigate to the Properties panel on the right side of the screen and click on the Object Data Properties tab (represented by a green camera icon).
  3. Change the Focal Length:
    • Locate the Lens dropdown menu.
    • Find the Focal Length field (default is 50mm).
    • Click and drag the slider, or type in a specific millimeter value. For portrait shots, 80mm to 85mm is common, while 24mm to 35mm works well for wide interior or landscape scenes.

How to Adjust Depth of Field

Depth of field creates a cinematic look by keeping your subject in sharp focus while blurring the background and foreground.

  1. Enable Depth of Field: With your camera selected, look under the same Object Data Properties (green camera icon) tab. Find the Depth of Field checkbox and check it to enable the effect.
  2. Set the Focus Target: Expand the Depth of Field panel. You can set the focus plane in two ways:
    • Focus on Object: Click the eyedropper tool next to this field and select the specific object in your scene you want to keep sharp. The camera will automatically track this object’s distance.
    • Focus Distance: If you do not want to lock onto a specific object, leave the “Focus on Object” field blank and manually adjust the Distance slider to set where the focal plane lies.
  3. Control the Blur (Aperture):
    • Expand the Aperture sub-section.
    • Locate the F-Stop slider.
    • Lower F-Stop values (e.g., f/1.4, f/2.8) create a shallower depth of field, resulting in a heavier, more pronounced background blur.
    • Higher F-Stop values (e.g., f/8, f/16) keep more of the scene in sharp focus.
  4. Refine Bokeh (Optional): Adjust the Blades and Rotation settings under the Aperture section to change the shape and rotation of the out-of-focus light highlights (bokeh).