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:

  1. Aperture (f‑stop) – how wide the lens opening is. A small number (f/1.8) = big opening = shallow depth of field.
  2. Shutter Speed – how long the sensor is exposed to light. Fast (1/1000 s) freezes motion; slow (1 s) blurs.
  3. 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.

  1. Crop & Straighten – remove distractions, align horizons.
  2. Exposure & Contrast – tweak brightness and contrast to bring out details.
  3. Colour Correction – adjust hue, saturation, and luminance.
  4. Sharpening – enhance edges; use Unsharp Mask sparingly.
  5. 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:

  1. Recommended aperture, shutter speed, ISO for a shallow depth of field.
  2. Recommended settings for a sharp, all‑in‑focus image.
  3. One composition rule you would apply.
  4. One lighting adjustment you would make in post‑processing.

Turn in your written answers for feedback!

Revision

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