1. Introduction to DSLR camera technology
Session Aim
Introduction to DSLR camera technology
Understanding THE EXPOSURE TRIANGLE required to shoot quality footage on a DSLR.
How many of you have had the lights out, what sort of results have you got

2. THE EXPOSURE TRIANGLE

3. Firstly…
YOUR SHUTTER SPEED ON THE DSLR SHOULD BE SET TO 50 WHEN SHOOTING VIDEO.
YOU CAN ADJUST THIS (BUT IT’S BEST NOT TO AT THIS STAGE IN YOUR FILM MAKING CAREER.
THIS IS WHERE THE
SHUTTER SPEED IS SHOWN
AND YOU ADJUST IT WITH
THE DIAL ON THE TOP OF
CAMERA.

4. SO THAT’S THE FIRST SIDE OF THE TRIANGLE DEALT WITH…

5. Now side 2, APPERTURE How your DSLR works
Light focuses on sensor.
The intensity of light hitting the sensor (the exposure) is controlled by an iris in the lens.
SENSOR

6. Sensor converts light to a video signal.
How your DSLR works
Sensor converts light to a video signal.
Without a light source it becomes harder and harder to create a good image, or achieve good exposure.

7. Exposure The exposure to light hitting the sensor is controlled by
the iris in the lens.
MENTION ZEBRAS AT THIS POINT as a guide for referencing exposure – 70%should be 90% Make sure lcd is set to mid level

8. Aperture & Exposure We call the exposure or iris the Aperture
Aperture is measured in F stops
Who has done photography … How does this effect depth of field and how might you then use this for creative effect?
F22
F11
F5.6
F2.8
Each turn of the iris either doubles or halves the amount of light hitting
The sensor in a camera

9. What does this mean?
If you are filming outside on a sunny day in order to get the correct exposure you are likely to have a stop of about F11 or higher.
The f stop is indicated on the
LCD or in the viewfinder

10. Alternatively if you are filming in less well lit environments you will need to open the aperture, allowing more light to hit the sensor to expose correctly
This is where you will find the f.stop reading on your canon camera.
It is adjusted by touching this and using the main dial on top of the camera.

11. By the way… Something else changes when you adjust the aperture…
It changes what we call the depth of field
This refers to the amount of space that remains sharp around your focus point
You can be really creative with this aspect of photography.
The larger the F.stop number, the larger the depth of field

12. Examples of exposure
Under exposed
Correctly exposed
Over exposed

13. So how do we fix this image?
Which one…

14. And This Image..?
Which one…

15. If adjusting the aperture does not fix the problem, then we move to the 3rd side of the triangle
ISO
It stands for International Standards
Organisation, but this does not tell you
Anything about how it can help you correctly expose a shot

16. When you press the ISO button on top of the camera, this is what you will see.

17. The higher the number, the more sensitive to light the sensor becomes

18. You adjust the ISO by pressing here…
Then use the dial to increase or decrease ISO setting.

19. BUT WHAT DOES INCREASING ISO DO TO THE IMAGE?
Adjust ISO too much adds NOISE to your image. Keep it as close to 100 as possible and don’t go over 1600/2000 if you can help it.

20. Remember…
You are creative people. Your best tool is…
Anyone planning on using lights… Available light so you will need to use colour correction to balance out the contrast ratio or reflectors.
And if it looks bad on the screen, it is your responsibility to adjust it, using the EXPOSURE TRIANGLE

21. To help, use your Exposure Meter
The meter tells you how over or under exposed you are. With this information you can now use your knowledge of the exposure triangle to get the perfect image.
Use this and you have not excuses for a poorly exposed image.