Depth Of Field - Canon XL1 User Manual

•
Unlike selecting the audio output in VCR mode, you cannot mix the balance at
this point — even if VARIABLE is chosen at the VCR menu, it is fixed during
camera mode.

Depth of Field

Shallow vs great DOF
Manipulating DOF = iris
Focal length (zooming in) - long focal length = shallow DOF
Camera to object distance (focus)
Cables
1. BNC - only designed to carry video signals
- co-axial
- insulated protected sheath
- doesn't generate electricity outside, nor is it influenced by electricity
outside of it
- professional cable
- analogue cable, carrying an analogue signal
2. Kettle plug - carries current/electricity
- controls behaviour of devices
- carries only electricity, not audio or video
3. RCA - analogue cable
- co-axial
- not professional
- domestic plug
- can take either video or audio, not simultaneously
- can only take one wavelength of information
4. Firewire cable - aka 4 to 6, 4 to 4, 6 to 6, 1394 protocol
- digital cable
- carries video and audio simultaneously
- only need one cable to digitise
- 2 types of firewire:
- also carries control information, can start and stop your machine
using a complicated control algorithm
(zooming out) – short focal length = great DOF =
all in the same focal plane
Firewire 400 = slower than USB2
Firewire 800 = same speed as USB2
17