Studio Lighting Diagram & Four-Light Power Planner
Start with your own readings. Calculate the change, verify a frame, and save what works.
Four-light studio planner
Meter key, fill, rim and background, then record their placement.
Record placement. Measure each light. Build the balance.
Use the editable diagram to record where lights sit. Use isolated meter readings to plan exposure. Moving a drawing is a geometry note; it does not silently recalculate what a real softbox contributes.
- Record key, fill, rim and background with the other lights off. Enter each reading and its actual flash power.
- Choose independent changes or a target combined subject reading. Combine only readings taken at the same point and meter orientation.
- Apply supported power settings, meter the combination, and verify the portrait. Background readings stay separate from the subject total.
An isolated f/5.6 key needs approximately one stop more output to meter f/8. An independent backdrop reading is not added to that subject reading.
Does dragging a light simulate its exposure?
No. The diagram records placement. Remeasure after moving a light, changing its aim or fitting a modifier.
Is the key-to-fill reading the final facial contrast?
No. Placement, spill, subject geometry and reflectance affect the photograph. The readings describe contributions at the chosen measuring point.
By Dwayne of DNA Premium Portraits, Sacramento-area portrait photographer. See formulas, assumptions and equipment sources.
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