1. What are the two ways exposure is controlled? And what are some other factors that play a role in exposure?
Aperture - Shutter-speed
(a few other factors that have escaped my brain right now)
(a few other factors that have escaped my brain right now)
2. You have an ISO of 400, a shutter speed of 1/125th second and an f-stop of F5.6.
a) I ask you to open up the aperture to let more light in by 2 stops. What would you change your reading to? - f/2.8
b) Now, back at your original setting, close down three stops. What is your setting now? - f/16
3. What are three ways you can measure exposure?
ISO (sensitivity to light)
Aperture (amount of light entering the camera)
Shutter-speed (the amount of time light is allowed through)
ISO (sensitivity to light)
Aperture (amount of light entering the camera)
Shutter-speed (the amount of time light is allowed through)
4. If in a given situation ‘correct’ exposure is achieved by using 125 @ f8 at ISO 100, indicate the new shutter speeds required to provide ‘correct’ exposure for the other ISO settings below.
Film Shutter speed Lens aperture
ISO400 f8 - 1/500
ISO200 f8 - 1/250
ISO50 f8 - 1/60
ISO25 f8 - 1/30
5. If in a given situation ‘correct’ exposure is achieved by using 125 @ f8
at ISO 100, indicate the new f-number required to provide ‘correct’
exposure for the other ISO settings below.
at ISO 100, indicate the new f-number required to provide ‘correct’
exposure for the other ISO settings below.
Film Shutter speed Lens aperture
ISO400 125 - f/16
ISO200 125 - f/11
ISO50 125 - f/4
ISO25 125 - f/2.8
6. When you use a high ISO you get image degradation. With film this is called increasing the size of the grain. With digital we don’t refer to grain, we refer to:
Digital noise or pixelation.
Digital noise or pixelation.
7. On your camera, what is the difference between AUTO mode and MANUAL mode?
AUTO mode is basically a setting that allows the camera to do the best job it can to balance out all of the reflected light it is receiving through the lens and set an exposure based on what mid-tones it finds. The result may not always be what you wanted.
Manual mode allows the photographer to tell the camera how to record the reflected light passing through the lens - allowing much more control over the exposure and can often gives a more creative result.
Manual mode allows the photographer to tell the camera how to record the reflected light passing through the lens - allowing much more control over the exposure and can often gives a more creative result.
8. All in-camera meters try to render the scene as a mid-tone. So if the mid-toned scene is rendered appropriately, what will happen to the light toned scene (white)? And the dark toned scene (black)?
If the camera is looking at a high-key setting (white), it will automatically compensate to darken the overall image (add darker tones).
If the camera is looking at a low-key setting (black), it will automatically compensate to lighten the image (add lighter tones).
A simple method of trying to balance things out to mid-tone as best it can.
If the camera is looking at a high-key setting (white), it will automatically compensate to darken the overall image (add darker tones).
If the camera is looking at a low-key setting (black), it will automatically compensate to lighten the image (add lighter tones).
A simple method of trying to balance things out to mid-tone as best it can.
9. What type of metering do built-in camera meters use?
I believe the answer to this is Evaluative metering. I know more advanced cameras now have a number of other metering options available, which can be selected by the photographer at any time.
10. If you are using ISO200 how more light sensitive will your exposure be if you change this to ISO400? (HINT: This is equivalent to 1 stop).
This change will make the film / digital sensor twice as sensitive to light.
D.
This change will make the film / digital sensor twice as sensitive to light.
D.
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