Beginners Introduction to Exposure Answers

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1.  What are the three types of photographers?
Technical, artistic, and those that have good artistic vision and combines technical knowledge to achieve that vision.
2.  What are the three parts of the exposure triangle?
Aperture, Shutter Speed, and ISO.
3.  What is aperture?
Aperture is a circular opening in our lens that is adjustable from a very small circle to almost as large as the lens itself. We adjust it to let more or less light hit the digital sensor or film.
4.  How is aperture expressed?
In f stops.
5.  Which is the bigger opening? f22 or f2.0 Explain your answer.
f2.0 is the larger opening because if you think of it in fractions, it would be the bigger one.
6.  A whole step (or stop) represents what in relation to the number next to it?
The doubling or halving of the light through the lens.
7.  What is Depth of Field (DOF)?
How much of the image is in focus. You can have a shallow DOF (only subject in focus) or a long DOF (everything in focus).
8.  What three things determine DOF?
Aperture, distance to your subject, and lens focal length.
9.  In low light do you generally want to open the aperture or close it down? Why?
You want to open up your aperture because you need to let more light in because of the dark space.
10.  What does shutter speed control?
How long the light comes through our aperture to our digital sensor or film.
11. How are shutter speeds expressed?
In fraction of a second.
12.  At what shutter speeds are most people able to hand hold a camera with a normal lens?
1/60th to 1/200th.
13.  What happens if you use a telephoto (long) lens?
Take the focal length of your lens and shoot at least as fast as that.
14.  What do you need to use if you can’t hand hold a camera steady?
A tripod.
15.  What is the rule of thumb regarding the focal length and hand holding a camera?
If the shutter speed is below 1/60th or above 1/200th use a tripod.
16.  What shutter speeds show motion?
Longer shutter speeds.
17.  What shutter speeds freeze motion?
Shorter shutter speeds.
18.  Why is shutter speed a decision?
Sometimes we may want to freeze our subject and keep it sharp and clear. Other times we want some blur on the subject to give the viewer the impression that the object is moving or is at speed.
19.  What is ISO?
The sensitivity to light of the sensor or film. 
20.  What is the downside of a high ISO?
It increases the noise/grain on the image.
21.  What does digital noise look like?
Blurry/pixelated.
22.  What is the dynamic range?
The difference between the brightest part of that scene and the darkest part.
23.  What does an overexposed image look like?
Way too bright. Loses detail in some bright places.
24.  What does an underexposed image look like?
Foreground is very dark and all the detail is lost to noise.
25.  What does a well-exposed image look like?
There is balance. Everything is lighted well and has detail.
26.  How does the exposure triangle work in practice?
Aperture, shutter speed, and ISO are all used to create the perfect image. Sometimes you have to adjust one when you change another.
27.  For every action, we take in one part of the exposure triangle what must happen in another part of the triangle?

It must be adjusted.

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