Find the focal length needed to frame a subject of a given size at a set distance.
For a subject to fill the width of the frame, the focal length equals the effective sensor width times distance divided by subject width. This framing math lets you pick the right lens before the shoot so the subject is framed as intended at the chosen stand position.
Focal Length for Framing
Focal length = sensor width x distance / subject width
Focal length = sensor width x distance / subject width For a subject to fill the width of the frame, the focal length equals the effective sensor width times distance divided by subject width.
This framing math lets you pick the right lens before the shoot so the subject is framed as intended at the chosen stand position.
This calculator takes 3 inputs: Subject distance, Subject width, Crop factor. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.