Week 7

Digital sensor array- does size matter???
Yes and no
Larger size=more photosites=more resolution
Smaller size=more compact=cheaper
1.35mm film size
Film is 35mm wide
Image area=24mm x 36mm
Half frame compact cameras=24mm x 18mm (circa 1913)

Sensor array size
Full frame sensor=24mm x 36mm
Smaller sensors defined with a crop factor
Eg: 1.5x
1.6x
crop factor relates to the cropping of the angle of view as a result of the sensor.
Effective focal length of lens is magnified by crop factor
Eg: 200mm lens x 1.5=300mm(effectively)
Photosite size and noise
SLR= Subject Luminance range
Film: known as “density range”
If photsite overflows it called “blooming”
Ability of sensor to record low to high luminance’s

Tungsten lighting
Electricity passes through tungsten filament causing it to glow, more electricity=more light
Tungsten filament lamps
Tungsten discharge lamps