Focal Lengths, Lighting, and Film Stocks
Focal Length Reference
Every focal length tells the AI how to render perspective, distortion, depth, and spatial relationships.
| Focal Length | AI Effect | Best For |
|---|---|---|
| 14mm | Extreme wide-angle distortion, dramatic perspective exaggeration, vast foreground | Architecture interiors, real estate, immersive environments, dramatic landscapes |
| 24mm | Wide but controlled, slight barrel distortion at edges, environmental context | Street photography, environmental portraits, photojournalism, establishing shots |
| 35mm | Natural "human eye" perspective, minimal distortion, balanced context | Documentary, street, editorial, lifestyle — the most versatile focal length |
| 50mm | Classic portrait perspective, minimal distortion, moderate compression | Standard portraits, product photography, everyday scenes, film stills |
| 85mm | Portrait compression, flattering facial proportions, smooth background separation | Headshots, beauty, fashion portraits, romantic scenes |
| 100mm macro | Extreme close-up detail, shallow DOF, reveals texture invisible to the naked eye | Product details, jewelry, food, nature, skin texture, material close-ups |
| 135mm | Strong compression, excellent subject isolation, dreamy bokeh | Editorial portraits, fashion, candid telephoto, celebrity photography |
| 200mm+ | Extreme compression, flattened perspective, intense background blur | Wildlife, sports, surveillance aesthetic, compressed cityscapes, paparazzi style |
Pro tip: Combine focal length with f-stop for precise control: "shot at 85mm f/1.4" gives maximum subject isolation, while "shot at 85mm f/8" keeps more of the scene in focus.
Lighting Setups
These named lighting patterns trigger specific associations in AI models trained on photography:
| Setup | Description | AI Effect | Best For |
|---|---|---|---|
| Rembrandt | Key light at 45° above and to one side; triangle of light on shadow-side cheek | Dramatic, painterly, sculpted faces with deep shadows | Dramatic portraits, editorial, fine art |
| Butterfly | Key light centered directly above and in front of the subject | Glamorous, symmetrical shadow under nose, flattening/slimming effect | Beauty, fashion, glamour, classic Hollywood |
| Split | Light hitting exactly one half of the face, other half in full shadow | Extreme drama, mystery, duality, high contrast | Noir, dramatic character portraits, villain aesthetic |
| Rim / Edge | Light from behind the subject, creating a bright outline/halo | Separation from background, ethereal glow, dramatic silhouette | Dramatic reveals, athletic photography, stage/concert |
| Loop | Key light slightly above and 30-45° to one side; small shadow loops from nose | Natural, flattering, subtle dimension without heavy drama | Corporate headshots, yearbook, general-purpose portrait |
| Chiaroscuro | Extreme contrast between light and dark, inspired by Baroque painting | Caravaggio-like drama, deep blacks, isolated highlights | Fine art, dramatic editorial, moody still life |
| High Key | Abundant, even light from multiple sources; minimal shadows | Bright, clean, optimistic, airy, modern | Beauty, commercial, lifestyle, product on white |
| Low Key | Minimal light, predominantly dark with selective illumination | Moody, mysterious, cinematic, heavy atmosphere | Noir, horror, dramatic editorial, luxury |
| Golden Hour | Warm, directional sunlight at low angle (sunrise/sunset) | Warm skin tones, long shadows, romantic atmosphere, natural warmth | Lifestyle, couples, outdoor portraits, landscape |
| Blue Hour | Cool ambient twilight light just before sunrise or after sunset | Cool, contemplative, cinematic, urban neon pops against blue sky | Cityscape, moody editorial, cinematic establishing shots |
Film Stock Reference
Film stock names in prompts trigger specific color science, grain structure, and tonal characteristics:
Color Negative
| Film Stock | Characteristics | Best For |
|---|---|---|
| Kodak Portra 400 | Warm skin tones, fine grain, beautiful highlight rolloff, forgiving exposure latitude | Portraits, weddings, fashion editorial — the most popular portrait film |
| Kodak Portra 160 | Finer grain than 400, slightly cooler, extremely accurate skin tones | Studio portraits, controlled lighting, beauty |
| Kodak Ektar 100 | Ultra-fine grain, vivid saturated colors, high contrast, punchy | Landscape, travel, product, anything requiring vivid color |
| Fuji Pro 400H | Cool-toned, pastel highlights, soft greens and blues, delicate grain | Light and airy photography, outdoor portraits, lifestyle (discontinued but iconic) |
Color Reversal (Slide Film)
| Film Stock | Characteristics | Best For |
|---|---|---|
| Fuji Velvia 50 | Hyper-saturated, extremely fine grain, deep blacks, vivid greens and reds | Landscape, nature, macro — the "National Geographic" look |
| Fuji Superia 400 | Consumer film aesthetic, warm, slightly green-shifted, noticeable grain | Casual, nostalgic, snapshot aesthetic, lo-fi editorial |
Black and White
| Film Stock | Characteristics | Best For |
|---|---|---|
| Ilford HP5 Plus | Medium grain, wide exposure latitude, rich midtones, classic B&W | Street photography, documentary, all-purpose B&W |
| Kodak Tri-X 400 | Distinctive grain structure, high contrast, punchy blacks, iconic tonality | Photojournalism, street, editorial — the most legendary B&W film |
| Ilford Delta 3200 | Heavy visible grain, high-speed, atmospheric, gritty texture | Low light, concert, night street, moody atmospherics |
Cinematic
| Film Stock | Characteristics | Best For |
|---|---|---|
| CineStill 800T | Tungsten-balanced, halation (red/orange glow around highlights), cinematic color | Night photography, neon, urban scenes, cinematic stills |
Exercise
Technical Photography Drill
- Choose a single subject (e.g., a portrait of a woman in a leather jacket).
- Generate the same subject at 5 different focal lengths: 24mm, 35mm, 50mm, 85mm, 135mm. Compare perspective and feel.
- Generate the same subject with 4 different lighting setups: Rembrandt, Butterfly, Split, Rim. Compare mood and drama.
- Generate the same subject with 4 different film stocks: Portra 400, Tri-X 400, Velvia 50, CineStill 800T. Compare color and tone.
- Combine your favorite focal length + lighting + film stock into one prompt. This is your personal "look."