Chapter 28 — Quiz

Twenty-six questions to check that you understand black-and-white conversion as a deliberate craft — the decision to convert, the channel mixer versus desaturation, dodging and burning, toning and grain, and the digital Zone System. Mix of multiple choice, true/false-with-justification, short answer, and a few "what's wrong with this conversion?" seeing questions. Answer before checking the key; the explanations matter more than the score.

Multiple choice

Q1. A great black-and-white photograph is best described as: - A) a color photograph with the saturation removed - B) made deliberately by translating color into chosen tones, not subtracted - C) any photograph shot under poor lighting - D) a photograph that failed in color and was rescued

Q2. You should keep a photograph in color (rather than convert) when: - A) the lighting is soft - B) the photograph is about a face or gesture - C) color is the subject (e.g. a red door against a grey wall) - D) there is a blue sky in the frame

Q3. The problem with converting by pure desaturation is that: - A) it makes the file larger - B) it collapses every color to one fixed gray, so different colors of similar brightness merge together - C) it only works on JPEGs - D) it always darkens the image too much

Q4. The channel mixer is best understood as the digital equivalent of: - A) a tripod - B) colored glass filters screwed onto a film lens - C) a light meter - D) a polarizer

Q5. A colored filter (and its matching channel-mixer slider): - A) lightens its own color and darkens its complement - B) darkens its own color and lightens its complement - C) affects only the shadows - D) has no effect in black and white

Q6. To darken a blue sky dramatically so clouds explode out of it, you: - A) raise the blue channel - B) lower the blue (and aqua) channel - C) raise the orange channel - D) add grain

Q7. The single most useful channel for converting a portrait is: - A) blue, moved up - B) green, moved down - C) orange, controlling skin - D) purple, moved up

Q8. Dodging in the darkroom and in develop means: - A) selectively darkening an area - B) selectively lightening an area - C) adding a color tint - D) sharpening an edge

Q9. The most-used dodge-and-burn move in monochrome finishing is: - A) a heavy sepia tone - B) a subtle edge burn (vignette) to hold the eye inward - C) maximum global contrast - D) blurring the background

Q10. The classic almost-can't-fail toning recipe is: - A) warm the shadows, cool the highlights - B) warm the highlights, cool the shadows - C) push everything toward green - D) maximum saturation everywhere

Q11. Film grain (digital) is added to a clean digital file in order to: - A) fix focus errors - B) give the image tactile, organic, film-like character (and mask minor noise) - C) increase resolution - D) correct white balance

Q12. On the Zone System scale, Zone V corresponds to: - A) pure black - B) pure white - C) middle gray — what a light meter assumes (an 18% gray card) - D) the brightest textured highlight

Q13. Average sunlit skin sits at approximately: - A) Zone I - B) Zone III - C) Zone VI - D) Zone X

Q14. Which develop tool moves local tones to a target zone (e.g. burning one bright corner down)? - A) the channel mixer - B) the global tone curve - C) dodging and burning - D) white balance

Q15. "Expose to the right" helps your conversion because: - A) it makes the sky bluer - B) protecting the highlights at capture yields cleaner shadows and more latitude to place tones in develop - C) it automatically converts to black and white - D) it adds grain

True / False (justify your answer in one sentence)

Q16. Removing color from a photograph always makes it more artistic.

Q17. Global contrast can fix two mid-grays that merged during a desaturated conversion.

Q18. A near-black noon sky from the blue slider is always the best choice for a landscape.

Q19. Good dodging and burning should be invisible — the viewer feels led but doesn't see the hand.

Q20. Heavy grain suits every black-and-white image equally.

Short answer

Q21. In two sentences, explain why channel mixing produces a stronger conversion than desaturation. Use the word "separation."

Q22. Name the three quickest channel moves from §28.3 (sky, skin, foliage) and the direction you usually move each.

Q23. State the complete conversion order in one line, from "decide" to "commit."

What's wrong with this conversion? (seeing questions)

Q24. A reader converts a photo of a red flower against green leaves by sliding saturation to zero. In the result, the flower has nearly vanished into the leaves — there's no clear edge between them. Name the cause and the specific fix.

Q25. Here is a described conversion. Name the two things over-cooked and how you'd fix each:

FIGURE Q28.1 — "Coastal headland, finished"      [constructed teaching example]
  A black-and-white seascape. The sky has been pulled to a blotchy, uneven near-black with visible
  banding. A heavy brown sepia tone is obvious across the whole image — a viewer at the far side of
  the room can name it as "brown." The headland and foreground are nicely textured; the composition
  is strong; the exposure protected the highlights.

Q26. A portrait of a person with deep brown skin has been converted by sinking the orange and red channels hard for "drama." The subject's skin has gone dark and muddy, losing the form and texture of the face, and the eyes are hard to find. Name the cause and the fix, and state the fairness principle from §28.3 you'd apply.

Answer Key

Q1 — B. Black and white is made, not subtracted; you translate color into chosen tones. (§28.1, opening)

Q2 — C. Keep color when color is the subject — a color relationship like the red door against grey. Soft light, a face, or a blue sky are not reasons to keep color. (§28.1)

Q3 — B. Desaturation applies one fixed recipe, so colors of similar brightness collapse to the same gray and merge — you lose the edge between subject and background. (§28.2)

Q4 — B. The channel mixer is the digital version of colored contrast filters; you have all the filters at once and can dial each continuously. (§28.3)

Q5 — A. A filter (and slider) lightens its own color and darkens its complement — e.g. a red filter lightens reds, darkens blues/cyans. (§28.3)

Q6 — B. Lower the blue (and aqua) channel to darken the sky so clouds separate and pop. (§28.3)

Q7 — C. Orange controls skin; it's the first slider to reach for in a portrait, usually moved up to brighten and smooth. (§28.3)

Q8 — B. Dodge = selectively lighten (from blocking light off the paper in the darkroom). Burn = selectively darken. (§28.4)

Q9 — B. The subtle edge burn / vignette is the most-used move — it keeps the eye from wandering out of the frame. (§28.4)

Q10 — B. Warm the highlights, cool the shadows — a split tone that adds gentle depth and richness. (§28.5)

Q11 — B. Grain adds tactile, organic, film-like character and can mask minor noise; it's a clean digital file's missing texture. (§28.5)

Q12 — C. Zone V is middle gray — what the meter reads, an 18% gray card. (§28.6)

Q13 — C. Average sunlit skin is about Zone VI, one stop brighter than middle gray. (§28.6)

Q14 — C. Dodging and burning move local tones to their target zones; the channel mixer (global, by color) and the curve (global, overall) are not local. (§28.4, §28.6)

Q15 — B. ETTR protects highlights at capture; because sensors record the most data in the brightest stops, you get cleaner shadows and more room to place tones in develop. (§28.6, recalled from Ch.26)

Q16 — False. Only some photographs are stronger in monochrome (about light, form, face, or chaotic color); when color is the subject, removing it removes the point. Conversion is a decision, not an automatic upgrade. (§28.1)

Q17 — False. Global contrast moves all pixels of a given brightness identically, so it cannot part two merged mid-grays — they move together. The fix is to re-convert with the channel mixer. (§28.2 Common Mistake)

Q18 — False. A near-black noon sky can look magnificent or cheap; restraint and whether it serves the picture decide. Push each channel only as far as the photo needs. (§28.3)

Q19 — True. The viewer should feel led but never see the haloing or tunnel-vignette that gives heavy-handed work away. (§28.4 Common Mistake)

Q20 — False. Grain is a stylistic statement; a serene high-key portrait usually wants little or none, while a gritty street frame can carry a lot. Amount must suit the picture and the viewing size. (§28.5)

Q21 — Model answer. Desaturation collapses colors of similar brightness onto the same gray, so the separation between subject and background disappears and the picture turns to mud at the edge. Channel mixing lets you lift one color and sink another so they become clearly different grays, manufacturing the tonal separation the picture needs. (§28.2)

Q22 — Model answer. Sky: lower the blue (and aqua) channel to darken it. Skin: raise the orange (and red) channel to brighten and smooth it. Foliage: raise or lower the green (and yellow) channel to make leaves airy or brooding. (§28.3)

Q23 — Model answer. Decide (is it B&W?) → engage monochrome → set channels (sky, skin, foliage) → tone curve for global contrast → dodge and burn to lead the eye → restrained tone and grain → check zones on the histogram → commit. (§28 Summary)

Q24 — Model answer. Cause: desaturation mapped the mid-red flower and the mid-green leaves (different colors, similar brightness) to nearly the same gray, so the edge between them vanished. Fix: re-convert with the channel mixer — raise the red channel (flower lightens) and lower the green channel (leaves darken) so they separate into clearly different grays. (§28.2, Figure 28.2)

Q25 — Model answer. Two over-cooked things: (1) the sky — pulled too far with the blue channel until it banded and went blotchy; dial the blue channel back up until the sky is dark but smooth and detailed. (2) the toning — the sepia is nameable from across the room; halve it (and halve again) until the warmth is felt but not seen. The composition, exposure, and foreground are fine — the failure is purely a lack of restraint in finishing. (§28.3, §28.5)

Q26 — Model answer. Cause: sinking the orange and red channels hard drove the skin (which lives in those channels) down to a crushed, detail-less dark gray, losing the face's form. Fix: lift the orange and red channels enough that the skin regains luminosity, dimensionality, and texture — bright enough to show form, even if you still want a somewhat dramatic look. Fairness principle: judge the skin tones you actually have, and ensure darker skin keeps its detail and form rather than collapsing into shadow — good black-and-white skin across every tone is bright enough to show form and texture. (§28.3 Accessibility & Inclusion)

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