Friday, January 10, 2014

Flash Basics

Flash fact #1: Every flash photograph is two exposures in one
Flash fact #2*: Flash exposure is not affected by shutter speed.
Flash fact #3: Flash illumination is dramatically affected by distance. 
Flash fact #4: Your camera measures ambient light and flash illumination separately.
Flash fact #5: With automatic flash metering, the flash illumination is measured after the shutter button is pressed, and the flash output is adjusted accordingly.
Flash fact #6*: Every SLR camera with a mechanical shutter has a maximum flash sync shutter speed
Flash Fact #7*: If you set your shutter speed faster than flash sync, or use Av mode with an aperture setting that requires a shutter speed faster than flash sync for proper exposure, the camera will automatically revert to flash sync speed when the shot is taken if a built-in or hotshoe-mounted flash is turned on.

Prompt 1:
Finish this sentence: The further your subject, the more powerful flash you need.

Prompt 2:
Will your exposure be brighter from the light produced by the flash, if you use a slower (longer) shutter speed? What type of light will a longer shutter speed increase in any type of exposure?


No it will not make any difference it will create more of a blur

Prompt 3:
What is the primary limitation of flash?

not enough power


Prompt 4:
What is the maximum sync speed of most DSLR cameras?

1/200th


Prompt 5:
What is a Guide Number on a flash?

the product of aperture and distance


Prompt 6:
What is the problem with using a flash pointing directly at a subject? How can a photographer address this problem?

it makes photos come out unsatisfying bounce it off a celling with a 45 degree angle


Prompt 7:
What is the advantage of getting a flash off of the top of a camera?

eliminates the chances of red eye and flash brackets have a pivot point with allows you to create a 90 degree angle


A slow sync is a longer exposure and rear curtain sync creates a natural look

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