Digital
Photography 1on1: Episode 1
How Shutter Speed Works
2 Curtain shutters-reveal light to center
-1st
curtain reveals light to camera sensor
-2nd curtain follows
behind the light
curtains reset and wait for another shutter release
@ slow shutter speeds (<200ths of a sec shutter speed): 1st
curtain opens completely before 2nd begins to follow
@ faster shutter speeds: curtain moves faster, slit becomes
smaller
SYNC SPEED
Allows 1st curtain to fully open before 2nd
follows
Always set shutter speed to cam’s sync speed or slower
(in order to prevent black areas)
CONTROL AMBIENT LIGHT EXPOSURE WHILE USING FLASH
(@ cam’s sync speed) w/o flash: completely black, not
enough ambient light for decent exposure
w/ flash: center is lit, but background is black,
only light camera sees is the light coming from flash->
to get more ambient light, slow down shutter aka ‘Key
Shifting’ using shutter to show more/less shutter by slowing/speeding up
shutter
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Digital Photography 1on1: Episode 2
How Light Meters Works
2 types of metering light
Incident: measure
light falling on subject itself; set cam&light meter to same shutter speed
ISO setting, meter gives correct aperture value&you set it accordingly
Reflective: light travels from source, reflect off
subject and into cam-down a lens hitting a mirror, light reflect at 45 degree
angle up into pentaprism, finally out eye piece
Set cam to manual mode, set shutter speed to sync speed, set ISO to low setting
Modes on reader
- metering ambient light
- metering flash
- cable sync, plug cable to meter, pull trigger->signal flash to fire->instant reader
- wireless meter- no need for cable, radio app tells flash to fire
Measure Light Independently
Turn lumosphere down (keep light from other lights hitting
it) point to light source; check ratios&adjust accordingly
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