Take a wee F-Stop test.

F-stops and Exposure.

Click on the correct answer.
You can have more than one attempt at each question but each wrong guess will affect your score.

An aperture and shutter combination of f-11 at 1/125th of a second will produce the same exposure, using the same film speed, as which of the following ?
1. f-8 at 1/60th of a second.
2. f-8 at 1/250th of a second.
3. f-16 at 1/30th of a second.
4. f-5.6 at 1/250th of a second.
If a combination of f-16 at 1/30th of a second yields the correct exposure what effect will be seen by increasing the aperture to f-8 ?
1. Underexposure.
2. Overexposure.
3. Nothing.
4. Reduced film speed.
My light-meter tells me I need an aperture of f-11 using 400 ASA film. If I am actually using 100 ASA film what aperture should I set ?
1. f-16
2. f-22
3. f-8
4. f-5.6
If I change my shutter speed from 1/250th of a second to 1/60th of a second how much more light will reach the film ?
1. Half as much.
2. Twice as much.
3. Four times as much.
4. Thee times as much.
What is the difference , in stops, between f-4 at 1/60th of a second and f-16 at 1/60th of a second ?
1. 2 stops.
2. 4 stops
3. 6 stops
4. 8 stops
What is the difference , in stops, between f-4 at 1/60th of a second and f-8 at 1/30th of a second ?
1. 1 stop.
2. 2 stops.
3. 3 stops.
4. 4 stops.
A film with a speed of 400 ASA is;
1. Twice as sensitive as 800 ASA film.
2. Half as sensitive as 200 ASA film.
3. Twice as sensitive as 200 ASA film.
4. Twice as sensitive as 100 ASA film
If I wanted to give my film 2 stops more exposure I could do which of the following ?
1. Increase the size of the aperture. (smaller f-number)
2. Reduce the size of the aperture. (larger f-number)
3. Increase the shutter speed. (faster)
4. Any of the above.
A setting of f-8 at 1/125th of a second using 100 ASA film would be equivalent to which of the following ?
1. f-11 at 1/125th of a second using 200 ASA film.
2. f-4 at 1/500th of a second using 100 ASA film.
3. f-11 at 1/30th of a second using 50 ASA film.
4. All of the above.
Which is the faster lens ?
1. 50 mm f-2.8
2. 300mm f-2.8
3. 90mm f-2
4. 50mm f1.4

Basic Photography Tutorials.

F-stops and Exposure.