Lens
Collects light and determines focal length, field of view and maximum aperture.
Free field guide / No video required
Know your camera.
A clear, practical guide to the controls that shape every photograph. Learn what each setting changes, then use it with intention.
Start with the camera
6Chapters
3Simulators
1Working method
Contents
From buttons to intent.
Chapter 01
Orientation
Know the camera.
Every modern mirrorless or DSLR camera follows the same basic logic. Light enters through the lens, reaches the sensor and becomes a file. The buttons simply tell the camera how to handle that light.
Sensor
Records the image. A larger sensor can help with low light and shallow depth of field, but it does not make the photograph for you.
Viewfinder / screen
Shows composition, focus and exposure. Turn on the histogram and level if your camera offers them.
Shutter button
Half-press usually focuses and meters. A full press takes the picture.
Control dials
Assign one dial to aperture and another to shutter speed. Fast access is more useful than menu knowledge.
Focus controls
Choose autofocus mode and focus area. A small movable point is the safest place to begin.
Memory card
Format it in the camera after backing up. Check remaining space before every important shoot.
Battery
Charge it, carry a spare and learn where the battery indicator lives before leaving home.
M / Manual
You choose aperture and shutter speed. Use it when light is consistent or when you want total control.
A or Av / Aperture priority
You choose aperture, the camera chooses shutter speed. Excellent for learning and everyday photography.
S or Tv / Shutter priority
You choose shutter speed, the camera chooses aperture. Useful when movement is the main concern.
Chapter 02
The opening in the lens
Aperture shapes depth.
Aperture is an adjustable opening inside the lens. It controls how much light enters and how much of the scene appears acceptably sharp from front to back.
Focus areaAperture
f/2.8
Result
Shallow focus
Exposure
Bright
Try it for: People, events, close details.
The number feels backward
A small number such as f/1.8 means a wide opening. A larger number such as f/11 means a narrow opening.
Distance matters too
Move closer to your subject or move the background farther away to make the background softer.
One person or many?
A single face can work at f/1.8. For a group, close down to f/4 or f/5.6 so more eyes stay sharp.
Every lens has limits
The aperture printed on a lens, such as 35mm f/1.8, is its widest available opening.
Quick check
Which aperture gives the shallowest depth of field?
Chapter 03
The length of the exposure
Shutter controls time.
Shutter speed is how long the sensor records light. A short exposure freezes movement. A long exposure records movement as blur and allows more light to reach the sensor.
Shutter speed
1/500s
Result
Crisp movement
Exposure
Less light
Try it for: Walking, events, street.
Two kinds of blur
Subject blur comes from what you photograph moving. Camera shake comes from your hands moving. A faster shutter helps both.
Start with the subject
Use 1/1000 for running, around 1/500 for active people and at least 1/250 for relaxed movement.
The handheld rule
As a rough starting point, keep shutter speed at least as fast as 1 divided by focal length. With 50mm, begin around 1/60 or faster.
Stabilization has limits
Stabilization reduces camera shake, not subject movement. It cannot freeze a person who is walking.
Quick check
A moving child is blurred. What should you change first?
Chapter 04
Signal and image quality
ISO buys brightness.
ISO does not create light. It amplifies the signal recorded by the sensor. A higher value makes the image brighter, but it can reduce detail, color accuracy and dynamic range while making noise more visible.
Signal gain
ISO 400
File
Clean
Use
Cloud, interiors near windows
Use ISO last
Choose aperture for depth and shutter speed for movement. Then raise ISO until the exposure works.
Noise beats blur
A sharp photograph at ISO 6400 is usually more useful than a clean but blurred photograph at ISO 400.
Auto ISO is a tool
Set a maximum ISO and minimum shutter speed. The camera can then react to changing light without taking away your creative choices.
Expose carefully
Brightening a severely underexposed file later can reveal more noise than choosing a suitable ISO while shooting.
Quick check
The aperture and shutter speed are right, but the frame is too dark. What next?
Chapter 05
Sharpness, perspective and color
The rest of the camera.
Exposure gets the light right. Focus, focal length and color decide where the viewer looks and how the scene feels.
Focus that stays where you put it
AF-S / One Shot
Focuses once and locks. Use it for still subjects, products and landscapes.
AF-C / Continuous
Keeps adjusting while the subject moves. Use it for people, events, children and action.
Focus area
A small point gives precision. A zone helps with unpredictable movement. Wide area is fast but gives the camera more control.
Eye autofocus
Excellent for people and animals, but still check that it found the nearest important eye.
Focal length changes the frame
16 to 24mm
Wide view for interiors, landscapes and strong foregrounds. Keep faces away from the edges.
35mm
A natural storytelling view that includes a person and their environment.
50mm
Balanced and familiar. Useful for portraits, details and everyday photography.
85mm and longer
Narrower view, more compression and cleaner backgrounds. Great for portraits and distant subjects.
White balance
Controls whether neutral light appears warm or cool. Auto works often. Use a fixed Kelvin value when color must stay consistent across a sequence.
Metering
Tells the camera which part of the frame to evaluate for exposure. Multi or matrix metering is the best default. Watch highlights in difficult light.
Exposure compensation
In A or S mode, use the +/− control when the camera makes the image too bright or dark. Start with small 1/3-stop changes.
RAW vs JPEG
RAW keeps more editing latitude. JPEG is smaller and already processed. RAW + JPEG is an easy learning setup if storage allows.
Drive mode
Single shot is calm and deliberate. Low burst helps with expressions. High burst belongs to action, not every moment.
Histogram
A graph of brightness from shadows on the left to highlights on the right. A wall pressed against either edge can mean lost detail.
Chapter 06
A repeatable workflow
Build the exposure in order.
Do not spin every dial at once. Make one creative decision, protect the photograph from blur, then solve the remaining brightness with ISO.
Choose depth
Set aperture for the amount of focus you want.
Protect motion
Set a shutter speed fast enough for the subject and your hands.
Finish with ISO
Raise ISO until the meter, histogram and preview show a useful exposure.
| Scene | Mode | Aperture | Shutter | ISO |
|---|---|---|---|---|
| Portrait outdoors | A or M | f/1.8 to f/2.8 | 1/250 or faster | Auto ISO, max 3200 |
| Street and travel | A | f/4 to f/5.6 | 1/250 minimum | Auto ISO, max 6400 |
| Landscape | A or M | f/8 | As needed, tripod below 1/60 | ISO 100 |
| Children or action | S or M | f/2.8 to f/5.6 | 1/1000 | Auto ISO |
| Indoor event | M + Auto ISO | f/1.8 to f/2.8 | 1/250 | Auto ISO, max 6400 |
| Night city | M | f/5.6 to f/8 | 1 to 10 seconds, tripod | ISO 100 |
These are starting points, not laws. Change them when the light, subject or result asks for something different.
Before the first frame
Set up once.
Shoot clearly.
- 01Set image quality to RAW + JPEG while you learn.
- 02Turn on the histogram, grid and electronic level.
- 03Choose AF-C for moving subjects and AF-S for still subjects.
- 04Start with a small or medium flexible focus area.
- 05Set Auto ISO limits you are comfortable with, such as 100 to 6400.
- 06Enable stabilization when handholding. Turn lens stabilization off on a locked tripod if the manual recommends it.
- 07Format the card in-camera only after your files are backed up.
- 08Reset exposure compensation to 0 before the next shoot.
The whole lesson in one line
Aperture decides the depth. Shutter decides the motion. ISO helps you make the exposure work.