Photography

The technical aspect

Schedule

• Camera anatomy
• Camera settings
• Troubleshooting

Camera anatomy

Camera osbcura

~ 500 B.C.

Nicéphore Niépce

• Silver chloride coated paper
• First photograph ~ 1824
• "Point de vue du Gras", 1827
  

A modern camera

A modern camera

A modern camera

A modern camera

A modern camera

A modern camera

A modern camera

A modern camera

Taking a picture

Taking a picture

Taking a picture

Taking a picture

Taking a picture

Taking a picture

Camera settings

Focal length

• ƒ
• Length to converge parallel light beams
  
• mm
• 8mm ⟶ 2000mm

Focal length

Focal length

Focus

Amount of light

Aperture

• Size of the hole
• ƒ/x
• ƒ/0.95 ⟶ ƒ/32

Aperture

Aperture

Aperture

Aperture

Sensitivity

• Capacity to take light
• ASA/ISO
• 100 ISO ⟶ 25600 ISO+

Sensitivity

Sensitivity

Shutter speed

• Exposure time
• 1/x s
• 1/8000 s ⟶ 30s+

Shutter speed

Steps

Rules of thumb

• Handheld, lens = X mm ⟶ shutter speed < 1/X s
• Sunny 16: on a sunny day ⟶ ƒ/16, X ISO, 1/X s

Light measure

• Spot metering
• Center weighted metering
• Matrix metering

Automatic modes

• Mode A: Aperture Priority
• Mode S: Shutter Priority
• ISO Auto

Troubleshooting

Blury picture

• reduce exposition time
• reduce hand shaking
• hold your breath
• use a VR system
• use a tripod/monopod
• use a sharper lens (do the rest first)

Underexposed picture

• augment exposition time
• augment apperture
• augment sensitivity
• turn on the lights
• use a flash
• avoid contrejour

Burnt picture

• reduce sensitivity
• reduce aperture
• reduce exposure time
• use an ND filter

Go take some pictures!

Credits

Slides, pictures* and graphics
Thibaut Lorrain - CC BY 2.0

Source available on github

*Except "Camera Obscura", "Nicéphore Niépse Portrait" and "Point de Vue du Gras"
which are public domain

Reveal.js
Hakim El Hattab and Contributors - MIT