Photography Studio Lighting Setups 5 — Questions and Answers
Question 1: What is the inverse square law's practical implication for studio lighting?
- Doubling the flash power doubles the light on the subject
- Doubling the distance from the light to the subject quarters the light intensity (Correct answer)
- Moving the light closer always doubles the light reaching the subject
- The light intensity is directly proportional to the distance
Correct answer: Doubling the distance from the light to the subject quarters the light intensity
The inverse square law states that light intensity falls off proportionally to the square of the distance, so doubling the subject-to-light distance reduces the light reaching the subject to one quarter.
Question 2: When using colored gels on background lights in a studio, what is the best practice to prevent the gel color from contaminating the subject?
- Use a shorter focal length lens to separate subject and background
- Place a gobo or flag between the background light and the subject (Correct answer)
- Increase the fill light power to overpower the gel color
- Always use complementary-colored gels on the key light
Correct answer: Place a gobo or flag between the background light and the subject
Placing a gobo or black flag between the gelled background light and the subject physically blocks spill from the colored light, preventing unwanted color contamination on the subject.
Question 3: What is the primary difference between a monolight and a pack-and-head studio strobe system?
- Monolights use continuous LED output while pack-and-head uses flash
- Monolights have the power supply built into the head, while pack-and-head systems use a separate external power pack (Correct answer)
- Monolights are always lower-powered than pack-and-head systems
- Pack-and-head systems have slower recycle times than monolights
Correct answer: Monolights have the power supply built into the head, while pack-and-head systems use a separate external power pack
A monolight integrates the power supply, controls, and flash head into a single self-contained unit, while a pack-and-head system uses a separate power pack connected to one or more flash heads.
Question 4: What is 'painting with light' in a studio context?
- Using colored gels to add hue to the background
- Using a moving continuous light source during a long exposure to illuminate different parts of the scene (Correct answer)
- Adjusting the power of each strobe to match a color palette
- Projecting patterns onto the background using a gobo holder
Correct answer: Using a moving continuous light source during a long exposure to illuminate different parts of the scene
Painting with light involves using a handheld continuous light source—such as a flashlight or LED panel—and moving it across a subject during a long exposure to selectively illuminate areas.
Question 5: In split lighting for portraits, how is the key light positioned relative to the subject's face?
- Directly in front at camera height
- To the side at a 90-degree angle, illuminating exactly half the face (Correct answer)
- Above and in front at a 45-degree angle
- Behind and above the subject at a steep downward angle
Correct answer: To the side at a 90-degree angle, illuminating exactly half the face
Split lighting positions the key light 90 degrees to the side of the subject so that exactly half the face is illuminated and the other half falls into shadow, creating a dramatic, high-contrast look.
Question 6: What is the role of the 'kicker' light in a studio portrait setup?
- To provide the primary illumination on the subject's face
- To add a highlight along the subject's side or back for separation and dimension (Correct answer)
- To light the background evenly from both sides
- To fill shadows created by the key light
Correct answer: To add a highlight along the subject's side or back for separation and dimension
A kicker is a light placed behind and to the side of the subject, adding a rim highlight along the edge of the face, neck, or shoulder to enhance separation from the background and add dimension.
Question 7: When photographing a highly reflective product like a wristwatch in a studio, which technique best controls unwanted reflections on the surface?
- Use a single overhead softbox at maximum power
- Use a tent or enclosure of diffusion material surrounding the product (Correct answer)
- Increase the ISO to reduce required light output
- Use a bare bulb strobe placed directly above the product
Correct answer: Use a tent or enclosure of diffusion material surrounding the product
A light tent or enclosure made of white diffusion material wraps the product in an even, near-shadowless light source from all sides, eliminating specular hotspots and unwanted reflections on shiny surfaces.
Photography Studio Lighting Setups 5
What is the inverse square law's practical implication for studio lighting?