Chapter 14 — Self-Check Quiz

Twenty-six questions to check your grip on product and food photography: multiple choice, true/false with justification, short answer, and several "what's wrong with this setup?" seeing questions. Answer before checking the key at the bottom. Aim to explain each answer, not just pick it — in this genre the reasoning is the skill. A topics-to-review map follows the key.

Multiple choice

Q1. A specular highlight is best described as: - (a) light scattered evenly off a rough surface in all directions - (b) the bright, mirror-like reflection of the light source itself on a glossy surface - (c) the darkest shadow on a matte object - (d) the color cast a surface adds to reflected light

Q2. You photograph a chrome kettle and a hard white streak ruins it. The most reliable fix is to: - (a) add two more lights from other directions to fill the streak - (b) make the source larger and softer (move it close, add diffusion) so the streak becomes a smooth gradient highlight - (c) switch to a smaller aperture - (d) raise the ISO

Q3. For a matte, textured object like a loaf of bread, the most form-revealing light is: - (a) flat, from directly behind the camera - (b) soft, raking across from the side - (c) a small bare bulb pointed straight at it - (d) no light — let the camera brighten it

Q4. On a mirror-like surface, what does the surface mostly "show" the camera? - (a) the light falling on the object - (b) the object's true color - (c) a reflected image of the surrounding room - (d) nothing — chrome records as pure white

Q5. In the one-window tabletop setup, the white bounce card's job is to: - (a) act as the main light - (b) control how dark the shadow side goes (fill) - (c) blow the background to white - (d) diffuse the sun

Q6. The best general light direction for objects and food is usually: - (a) front (window behind the camera) — it's brightest - (b) back-and-to-the-side — it separates, reveals, and makes moist things glow - (c) straight down from directly overhead - (d) directly from below

Q7. A sweep produces a "floating" object because it: - (a) uses a very wide aperture - (b) is a continuous curved sheet with no hard table-to-wall corner, so there's no seam behind the object - (c) is always pure white - (d) requires focus stacking

Q8. Focus stacking is used in product/food work primarily because: - (a) it makes colors more saturated - (b) up close, depth of field is razor-thin and stopping down to f/22 softens the image with diffraction - (c) it removes reflections - (d) it speeds up the shoot

Q9. Which hero angle best suits a tall, triple-layer cake? - (a) straight down (overhead) - (b) three-quarter (~45°) - (c) eye level / straight on - (d) from directly below

Q10. Steam will only photograph well when there is: - (a) a bright white background and front light - (b) a dark background and backlight behind the steam - (c) a wide aperture - (d) a polarizing filter

Q11. A black card (flag / negative fill) in a product setup is used to: - (a) add light to the shadows - (b) subtract light — deepen a shadow or draw a clean dark edge on a glossy surface - (c) diffuse the source - (d) warm the color temperature

Q12. "Prop creep" refers to: - (a) props slowly sliding out of focus - (b) adding so many supporting elements that the hero subject drowns and the frame loses a clear subject - (c) using props that are the wrong color temperature - (d) renting props you don't need

Q13. A bright-field lighting setup (glowing liquid, thin dark edge lines, clean white background) is created by: - (a) pointing a hard light directly at the front of the glass - (b) backlighting the glass through a large white surface - (c) surrounding it with black cards only - (d) shooting in total darkness

Q14. Generous negative space around a small product tends to read as: - (a) an unfinished, lazy photograph - (b) elegance, value, and confidence (and leaves room for a headline) - (c) a technical error - (d) underexposure

True / False — and say why

For each, mark True or False and write one sentence of justification. A right T/F with wrong reasoning earns nothing.

Q15. You light an object directly; the reflections on a glossy surface are an unfortunate side effect you should always try to eliminate.

Q16. Moving a soft light source closer to a small object makes its light softer.

Q17. The same soft side light is the correct primary strategy for both a wool sweater and a polished silver bracelet.

Q18. Front-lighting food (light behind the camera) is generally the best choice because it is the brightest and shows the most detail.

Q19. A phone is poorly suited to product photography because its sensor is small.

Q20. Stopping all the way down to f/22 is the best way to get a close-up product sharp from front to back.

Short answer

Q21. In one sentence each, define specular highlight, diffuse reflection, and the hero angle.

Q22. Explain the principle "light the reflection, not the object," and why it means the size and position of your light are composition choices on a glossy surface.

Q23. Name three honest cues that make food read as fresh, and for one of them, state the condition it requires to photograph.

Q24. "White to add, black to subtract." Explain what each card does in a product setup and give one situation where you'd reach for each.

Seeing questions — what's wrong here?

Q25. Read this setup and diagnose it. A photographer wants a clean, appetizing shot of a tall stacked burger. They place the window directly behind the camera (front light), set the camera on a tripod pointing straight down at the burger from overhead, and fill the frame edge-to-edge with the plate plus four props (fries, a drink, a napkin, scattered sesame seeds). The result looks flat, glary, busy, and "short." Name the three distinct mistakes and prescribe the fix for each.

Q26. Read this Described Photograph and find the error.

FIGURE Q14 — "Silver watch on white" [constructed teaching example — contains a deliberate mistake]
  THE FRAME    A polished silver watch lies on a white sweep, dial toward camera.
  THE LIGHT    Three small bare bulbs aimed directly at the watch from left, right, and above, to
               "make sure the metal is bright enough."
  THE EFFECT   The dial and band are covered in several hard white blotches and hot streaks; the metal
               looks dented and dirty; you can't read the shape.

The photographer concludes the watch is "just hard to shoot." Diagnose the real problem and prescribe the correct lighting approach in two or three sentences.

Answer Key

Q1 — (b). A specular highlight is the mirror reflection of the source itself; it moves as the angle between source, surface, and viewer changes. (a) describes diffuse reflection.

Q2 — (b). Enlarging and softening the source turns the ugly hard streak into a smooth, form-revealing gradient highlight. Adding more lights (a) just paints more streaks; aperture/ISO (c, d) don't change a reflection's shape.

Q3 — (b). Soft side (raking) light makes every bump and fiber cast a tiny shadow, revealing texture and three-dimensional form. Flat/front light hides it.

Q4 — (c). A mirror-like surface reflects the room — the window, ceiling, clutter, you — which is why naive chrome shots are full of distracting blotches. You control the surface by controlling what it reflects.

Q5 — (b). The bounce card is the fill: it reflects light back into the shadow side and sets how dark the shadows go (the tabletop equivalent of a lighting ratio). The window is the main light; a separate background light blows the sweep white.

Q6 — (b). Back-and-side light rim-lights top edges (separation), makes translucent/moist things glow, and puts a gently filled shadow toward the camera (volume). Front light flattens.

Q7 — (b). The continuous curved sheet has no corner/seam behind the object, so the background reads as one edgeless field and the object appears to float. A sweep needn't be white (c) and doesn't require stacking (d).

Q8 — (b). Close up, depth of field is extremely shallow; stopping to f/22 to compensate causes diffraction softening. Stacking lets you shoot at the sharp aperture and build depth of field by merging.

Q9 — (c). Eye level / straight on shows a tall layered subject's height and strata — its whole appeal. Overhead would flatten it into a brown circle.

Q10 — (b). Steam is visible only when backlight passes through it against a dark background; front light and a bright background make it disappear.

Q11 — (b). A black card subtracts light (negative fill) — deepening a shadow for shape, or drawing a clean dark edge that defines a glossy object's contour.

Q12 — (b). Prop creep is over-styling until no single hero is obvious and the frame is merely busy; the fix is to remove props until one subject clearly leads and everything else serves it.

Q13 — (b). Bright-field = backlight through a large white surface, giving glowing liquid with thin dark edge lines on a clean white ground. Direct front light (a) just blows a hole through the glass.

Q14 — (b). Negative space isolates the subject (it commands all attention), reads as luxury/confidence, and leaves room for text. It is a deliberate choice, not an unfinished frame.

Q15 — False. On a glossy surface you can't eliminate the reflection — and you shouldn't want to. You shape it: a big soft source becomes a smooth, form-revealing highlight; the reflection is the tool, not the enemy.

Q16 — True. Closer makes the source larger relative to the object, widening the soft shadow fringe (penumbra), so the light softens — the same principle as moving a softbox closer to a face (Chapter 12).

Q17 — False. The sweater (matte) wants raking side light to reveal texture; the bracelet (reflective) wants you to build its reflections with white and black cards — the light itself is almost an afterthought. Same light source, opposite strategy.

Q18 — False. Front light is brighter and deader — flat, glary, with the food's form collapsed and no sheen. Back-and-side light (turn the plate around) is the appetizing choice; "brightest" is not the goal.

Q19 — False. A phone is excellent for product work: the subject sits still and the light is fully controllable, and the tiny sensor's deep depth of field often gets a small object sharp front-to-back in one frame. Surface read, light direction, and framing — all phone-friendly — are what matter.

Q20 — False. Up close, f/22 invites diffraction softening that blurs the whole frame; the sharp move is to shoot at the diffraction-free aperture (often around f/8–f/11) and focus stack to build depth of field.

Q21. Specular highlight — the bright, mirror-like reflection of the light source itself on a glossy surface, which moves as the viewing angle changes. Diffuse reflection — light scattered evenly in all directions off a rough/matte surface, so it looks the same brightness from any angle and shows true color and form. Hero angle — the camera position chosen to show a particular subject at its most appealing (overhead, three-quarter, or eye level, depending on where the appeal lives).

Q22. On a glossy surface the camera records an image of the light source drawn on the object, so the source's size, shape, and position determine the size, shape, and position of the highlight you see — which means choosing them is literally composing the reflection (a composition decision), not just "adding light."

Q23. Any three of: sheen/moisture (needs backlight, optionally a brush of real oil); steam (needs a dark background and backlight); condensation on a cold drink (needs a chilled glass in warm air / a light mist); a color-accent garnish (added last); a "just now" gesture (a pour, a bite, a lifted fork). For the example named, state its condition correctly (e.g., steam → dark background + backlight).

Q24. White card adds — it bounces light back to fill shadows on a matte object or to fill a reflective surface with clean bright tone (reach for it to open up a too-dark shadow side or make metal gleam). Black card subtracts — negative fill that deepens a shadow for shape or draws a clean dark edge defining a glossy object's contour against a light background (reach for it to add drama to a flatly lit matte object, or to carve a chrome edge on a white sweep).

Q25. Three mistakes: (1) Front light — the window behind the camera flattens the burger and adds glare; fix: turn the setup so the light comes from behind/beside the burger and add a white card on the camera side. (2) Wrong hero angle — shooting straight down on a tall subject hides its height and layers, the burger's whole appeal; fix: shoot at eye level / straight on to show the stack. (3) Prop creep / no negative space — filling the frame edge-to-edge with four props leaves no clear hero and reads as busy; fix: cut to one or two props that do a job and leave clean negative space so the burger leads.

Q26. The real problem isn't the watch — it's the lighting strategy. The photographer treated a reflective object with a matte recipe (aim lights at it), so each of the three bare bulbs painted its own hard reflection onto the metal — hence the blotches and streaks. The correct approach is to build the reflections: surround the watch with large, clean, even surfaces (a light tent, or big white cards) so it reflects smooth bright tone, add a black card to draw a defining dark edge, and light those surfaces from outside rather than aiming any source at the watch directly.

Topics to review by question

Anything you missed, re-shoot rather than re-read — set the object on the table and make the picture the question describes. In this genre, the camera teaches faster than the page.