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The Photographic Triangle

The Big Three in Photography
by

Scott Wolfe

on 21 January 2013

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Transcript of The Photographic Triangle

Part 1 The Photographic Triangle Understanding light is the most important and the most difficult thing to master.
Exposure we know is what:
The total amount of time/light allowed. The photographic Triangle: Aperture A camera is nothing more than a light sealed box
There are three basic parts to a proper exposure:
Aperture, Exposure time, and ISO (film speed) The photographic Triangle: Aperture An aperture is a hole or opening through which light travels. The photographic Triangle: Aperture The key thing to remember is that this is controlled by the lens not the camera.
The more options your lenses have the pricier it will be. You will need to consider this when purchasing a lense.
Fast lenses requires larger aperture stops.
Can notice this just by holding the camera. The photographic Triangle: Aperture The following image is shot at f 1.8, exp 1/1600, ISO 100 The photographic Triangle: Aperture The same image with the settings of f 14, exp 1/25, ISO 100 The photographic Triangle: Aperture Film speed is the number that represents the film’s sensitively to light.
The higher the number, the more sensitive to light:
Less light is needed to tale a well exposed photo.

Film speeds range from 25 to 1600 and sometimes higher. The photographic Triangle: Film Speed or ISO Some general examples:
25 to 200 is best for portrait work
400 is best for mixed lighting settings (ex: outside and inside shots at the same time)
800 to 1200 is used for fast moving objects in mixed lighting
1600 for very fast moving objects like a car race The photographic Triangle: Film Speed or ISO Higher speed films can be used creatively:
Concerts can be shot by setting the camera to 1600 ISO and an aperture setting of 2.8.
The trade off of a faster film speed is increased graininess.

Not noticeable in smaller sized prints compared to larger ones. The photographic Triangle: Film Speed or ISO Shutter speed:
represents the time that the shutter remains open when the button is pushed.

Shutter speeds range from 1/8000 on some cameras to 30 seconds. The photographic Triangle: Shutter Speed For each stop you move your shutter speed you either half or double the amount of light.

1/500 – 1/250 of a second cuts the light in half

The fallback of a longer shutter speed is obviously that motion is affected. The photographic Triangle: Shutter Speed 1/4000 to 1/2000………. Stop a Hummingbirds wings or other fast action1/1000 to 1/500………… Freeze a human running and most athletes1/250 to 1/60…………… Stop most daily movement and handheld blur safe1/30 to 1/8……………… Blur motion (camera should be on a tripod)1/2 to long time………… Dark scenes, night time, etc (tripod only) The photographic Triangle: Shutter Speed Using and understanding shutter speeds can allow for some creative motion blurred shots.

f/22 and shutter speed of 1/8 of a second creates The photographic Triangle: Shutter Speed The photographic Triangle: Shutter Speed The photographic Triangle: Working Together Review:

Aperture - ???? The photographic Triangle: Working Together Shutter - ???? The photographic Triangle: Working Together ISO or Film Speed - ???? The photographic Triangle: Working Together The sunny 16 rule:

f/16
ISO of 100
Shutter 1/125 The photographic Triangle: Working Together The sunny 16 rule states that if you move one of the three parts of the triangle one stop then at least one of the remaining two parts needs to be moved as well.

Move the stop to f/8
What is the iso?
What is the shutter? The photographic Triangle: Working Together Move the f stop to 2.8

Keep the ISO at 100
What is the shutter speed? The photographic Triangle: Working Together
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