develop knowledge of skills and processes relevant to photography
📷 Cambridge IGCSE Art & Design 0400 – Photography
Objective
Develop knowledge of the key skills and processes that make a photograph look good and convey a message.
1️⃣ Technical Basics
Think of a camera as a magic box that captures light. The three main controls are:
- Aperture (f‑stop) – how wide the lens opening is. A small number (f/1.8) = big opening = shallow depth of field.
- Shutter Speed – how long the sensor is exposed to light. Fast (1/1000 s) freezes motion; slow (1 s) blurs.
- ISO – sensor sensitivity. Low ISO (100) = less noise; high ISO (800+) = more noise but brighter.
These three form the Exposure Triangle:
| Aperture | Shutter Speed | ISO |
|---|---|---|
| f/1.8 – f/4 (wide) | 1/500 s – 1/30 s (fast) | 100 – 800 (low to medium) |
| f/8 – f/16 (narrow) | 1 s – 30 s (slow) | 1600+ (high) |
📐 Exposure formula (for quick mental math): $EV = \log_2\left(\frac{N^2}{t}\right)$ where $N$ is aperture and $t$ is shutter time.
2️⃣ Composition Techniques
Good composition is like a storyboard for your eye.
- Rule of Thirds – imagine a 3×3 grid; place key elements on the lines or intersections.
- Leading Lines – use roads, fences, or shadows to guide the viewer’s gaze.
- Framing – use doors, windows or branches to frame the subject.
- Balance – distribute visual weight evenly; avoid clutter on one side.
- Negative Space – give your subject room to breathe.
🔍 Analogy: Think of composition as arranging a musical score – each element has a place and tempo.
3️⃣ Lighting & Colour
Light is the colour palette of photography.
- Natural Light – golden hour (sunrise/sunset) gives warm, soft light; midday is harsh and high contrast.
- Artificial Light – studio strobes, LED panels; control colour temperature with gels.
- Colour Temperature – measured in Kelvin (K). Warm = 2000–3000 K (orange), Cool = 5000–6500 K (blue).
- White Balance – adjust to keep colours natural; use presets like Daylight, Cloudy, or Flash.
📊 Tip: Use a colour chart to calibrate your camera’s white balance before shooting.
4️⃣ Post‑Processing Basics
Editing is like painting with light after the photo is taken.
- Crop & Straighten – remove distractions, align horizons.
- Exposure & Contrast – tweak brightness and contrast to bring out details.
- Colour Correction – adjust hue, saturation, and luminance.
- Sharpening – enhance edges; use Unsharp Mask sparingly.
- Noise Reduction – especially for high ISO shots.
🛠️ Analogy: Think of editing software as a digital darkroom where you can develop the image to your liking.
5️⃣ Exam Tips & Common Mistakes
Exam Focus
- Show a clear understanding of the Exposure Triangle – explain how changing one setting affects the others.
- Use composition rules to justify why a photograph is effective.
- Discuss lighting choices and how they influence mood.
- Include a brief post‑processing workflow (what you would adjust and why).
Common Pitfalls
- Over‑exposed or under‑exposed images – always check the histogram.
- Shaky shots – use a tripod or steady hand; enable image stabilization.
- Ignoring composition – a technically perfect image can still feel flat.
- Too much post‑processing – keep edits natural; avoid over‑saturation or extreme sharpening.
💡 Remember: The examiner looks for intentional choices, not just technical perfection.
6️⃣ Quick Practice Exercise
Choose a simple scene (e.g., a cup on a table). For each of the following, write down:
- Recommended aperture, shutter speed, ISO for a shallow depth of field.
- Recommended settings for a sharp, all‑in‑focus image.
- One composition rule you would apply.
- One lighting adjustment you would make in post‑processing.
Turn in your written answers for feedback!
Revision
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