Digital Infrared Photography Primer

Table of Contents

Chapter 1 – Introduction to infrared photography

History of infrared photography

Discovery of IR light
Development of infrared film
Development of digital cameras

Applications/uses

Medicine
Military
Astronomy
Botany
Ecology
Forensics
Law enforcement
Art

Chapter 2 – Basic Theory

The electromagnetic spectrum

Ultraviolet light
Visible light
Near infrared light
Far infrared light
Color is reflected light

How humans see color
How photography film records light
How digital camera sensors record light
Light sources

Sunlight
Tungsten light
Flouresent light
HID light
Electronic flash light

How filters work
How light waves focus at different points

Infrared focus marks on lenses

3 – Film Infrared Photography

Film choices
Film sensitivity
Film handling
Camera choices
Filter choices
Focus techniques
Exposure methods
Reciprocity

4 – Digital Infrared Photography

Advantages over film photography

Sensitivity
Grain
Glow
Mobility
Focus
Previews
Costs
Handling
Manipulation

Choosing a camera

IR sensitivity

How to test

Sensor type

CCD/CMOS

Sensor Size
Hot mirror filter
Stock vs modified

No external filters needed
No filter adapters for P&S cameras needed
See through DSLR viewfinder normaly
Much brighter P&S camera preview image
Autofocus / manual focus works normaly
More consistent exposure
No tripod needed
Better ISO speeds

Do it yourself or Professionaly

DIY modification
Professional modification

DSLR vs point & shoot

Portability
Image quality
Lens choices
Lens speed
Hot spots
Ability to attach filters

Costs
Upgrades

Lenses

P & S wide angle adapters

SLR lenses

IR focusing

Custom calibration for converted cameras

Hot spots
Wide angle distortions

External filters

IR filters
ND filters
Polarizing filters

Internal filters for modified cameras

Deep BW Infrared Filter
Standard Color Infrared Filter
Enhanced Color Infrared Filter
Super Color Infrared Filter
Super Blue Infrared Filter
Full Spectrum (UV/IR/Visible) Filter

5 – Infrared Shooting Techniques

Importance of white balance

Setting white balance

Importance of RAW file capture

Photoshop RAW vs OEM RAW software

Focusing considerations
Exposure
Tripod
Filters
Electronic Flash

Conventional
Modified to IR