HD 1st AC 101 Lesson Plan
by Sean Fairburn |
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A fundamental change in the way
good High Definition is to be done, different from film sets and
different from video only sets, is the very necessary good relationship
between the 1st AC and the Vision Engineer, Digital Image Technician,
or Video Controller. Good communication and an understanding of
the roles each person performs goes a long way in keeping the "Camera Dept" from
having problems. There is no engineering and camera, it's all "Camera" and
the 1st AC and the engineer must establish a good relationship.
Where the engineer does his or her job is not "video village",
it is the engineer's workstation. Their work is a necessary contribution
to the success of the camera department and the show and should
be respected and treated as such. It is not a secondary luxury
like video playback. Helping one another get the job done right
is the only way the camera crew can function properly.
Sound will also come to you and plug sound cables into the camera.
Be a team player and don't give them a hard time. Putting sound
on the HD tape as it is shot can save thousands of dollars in syncing
of dailies in post and every effort possible should be made to
accommodate the sound department in this effort.
These are what I consider the basic skills an AC should possess
to comfortably take on a High Definition job. You need to be aware
of the features and capabilities of the camera even if it may not
be your direct responsibility to perform the functions.
Camera Power Distribution
AC-550 via 4-pin to HDCA-901 or Camera.
Onboard AC power supply via Aspen, Anton Bauer, Sony.
Onboard Sony Lithium Ion Battery (dovetail mount).
Onboard Anton Bauer Battery (3 prong mount).
Accessory Power Distribution
Onboard monitors, downconverters, lens lights, DA's , wireless
receivers & transmitters.
Hirose 4-pin 12v DC out of Camera.
Anton Bauer 2 prong from Camera battery plate.
Off board block battery 4-pin direct or to mini distro box.
Back Focus
Stop wide open. If too bright, increase shutter and/or ND.
Turn Peaking and Contrast up, Brightness Down.
Zoom in, Focus on Back Focus chart, Zoom Out wide.
Adjust back focus until crispy and sharp.
Reset Stop, shutter, ND, and Viewfinder.
Timecode
Record Run TC Generator runs only while recording.
Free Run TC Generator runs continuously.
Shift & Advance are used to set timecode (Hour=Tape#).
Jam syncing with Genlock, TC Out & In for Free Run.
Lockit Box external TC source also works well for Free Run.
Cabling
Part of the Camera dept and a necessary part of shooting in HD.
Situation will determine how many and what type. Cables go from
camera to the Engineering Workstation or tent. Generally: Go
Fiber Optic if possible or SDI, YPbPr (RGB), Sound, Remote control
cables. Video dept (Video Village) has their own cables that
are downconverted NTSC and should come from the Engineering Workstation.
Now Fiber optic reduces all to one.
Field of View
Wider than 2:1 for HD Lens FoV to 35 mm Film lens. FoV equivalent
or 2.35:1 on the wide focal lengths.
(1.85 in 90%) Not as much on longer focal lengths, closer to 2:1.
Depth of Field
Don't be deceived about having too much and taking it easy. Build
your own charts to understand each lenses f-stop/focal length
characteristics. Wide angle lenses have more DoF, but the DoF
drops sharply as you increase focal length.
Sound (it is now!!)
You may be responsible for plugging in sound cables Ch 1 & Ch
2 and double checking good tone levels on LCD panel @ -20db. When
you record bars at the head of every tape, also lay tone from sound.
Using the Denecke timecode generator attached to Cam SB-2, sound's
timecode may also be fed into your Ch 3 @ -30db.
Onboard
Monitoring in HD (ERG & Astro are good)
HD SDI off the HDCA-901 or Evertz onboard downconvter.
HD Analog YPbPr off camera (will also carry Menu and VF info).
NTSC Via Downconvert.
Aspect Ratio Adjustment
Decide what aspect ratio you will shoot beforehand.
Build yourself a safe area and shoot frame charts to insure Post
knows what you are doing.
Operator File Page (03)
Marker : ON
Center (crosshair) : ON 3
Safety Zone : ON 90%, 80%, 92.5%, 95%
Effect : ON
Aspect Mode : Var V, 16:9, 15:9, 14:9, 13:9, 4:3, Var H, Vista1
(1.88), Vista2
Mask : ON 50 (level of dark area shade)
Var Width : 940 (for 1.85 inside of 90%)
Shutter Speed/ECS Adjustment
Toggle switch is below Lens. OFF, ON, Sel(ect) under plastic door.
(24 & 23.98psf) OFF, 1/32nd, 1/48th, 1/96th, 1/125th, 1/250th,
1/500th, 1/1000th, ECS (24.0 to 2200 Hz).
Syncing
to Computer Monitors (ECS)
ECS Extended Clear Scan, an option in Shutter Speed.
Use rotary encoder to dial flicker out of monitor or flickering
lights.
Frame Rate & Format
Adjustment
Maintenance (M7) page
Set cursor to NEXT and use rotary encoder to select frame rate,
then ****Power down the camera to affect change.****
"HD
is Really Good Video and Really Cheap Film"
Options are:
60i - NTSC Video equivalent (drop/nondrop still available) 59.94i
- NTSC Video equivalent* (drop/nondrop still available) 50i - PAL
Video equivalent 30psf - 30 Frame Progressive Film equivalent 29.97psf*
- 29.97 Frame Progressive Film equivalent 25psf - 25 Frame Progressive
Film equivalent 24psf - 24 Frame Progressive Film equivalent 23.98psf*
- Downconvertable 24 Frame Progressive Film equivalent*
Cueing (Reracking)
the Tape -
'CHECKING THE GATE'
Whenever power is broken (battery change) or tape is taken out
and put back in, it is necessary to perform a match frame edit
to prevent a break in control track and Time Code.
Push RET button behind Zoom rocker on the ENG lens or Assignable
Toggle on side (Adjustable via Menu) LENS RET.
Set Timecode switch under Advance button to REGEN*. TC will pick
up where it left off automatically after it replays the last 5
seconds. Can also be done from RMB-150.
Onboard ND
ND filter wheel
1 - clear glass no ND no light loss
2 - 1/4th or ND .6 = 2 stop light loss
(1/8th or ND .9 = 3 stop light loss (/3 version))
3 - 1/16th or ND 1.2 = 4 stop light loss
4 - 1/64th or ND 1.8 = 6 stop light loss
Color Correction
A - 4 point star filter. (or 5600K new /3 version).
B - 3200K filter (clear glass cam is Tungsten Base).
C - 4300K filter 85C used for mixed color temp light.
D - 6300K filter 85B+81B used for Daylight & HMI's.
Proper Eyepiece Adjustment
Set Camera to Color Bars and turn Contrast down 1/4 turn, Set Brightness
till rightmost Pluge black bar is barely visible (SMPTE 16x9),
or till rightmost Black bar (FULL 16x9) matches darkness of outside
edge of viewfinder.
Save vs. Standby
Save - takes 7 seconds to record, Tape is off the head.
Standby - takes 1.5 seconds to record, Tape on head.*
Either way you should record for 6 to 10 seconds before calling
Speed, Marker, Set, ACTION. This will always insure enough Preroll
to use the footage shot (like necessary leader for the editor).
Gain (electric enhancement which increases sensitivity of camera.
Every 6db=1 stop.)
L-Low - Adjustable via Menu usually 0db*
M-Med - Adjustable via Menu usually +3db, or +6db*
H-High - Adjustable via Menu usually +9db, or +12db*
Beware of adding too much unnecessary noise with increase in gain.
DCC Dynamic
Contrast Control Switch (maximizes separation of highlight
distinction - a good thing when used correctly)
Sets the output of camera to Color Bars or Camera.
Also turns DCC circuit ON* or OFF. AKA 'Auto Knee'
White Balance (Trigger for WB and Black Balance next to shutter
speed below Lens)
Performs function of shooting Gray Card at head of Scene.
Preset - corresponds to CC filter preset set WB.
A - Manually adjusted WB stored in memory. (shoot white card to
set)
B - Additional Manually adjusted WB stored in memory. (Same)
Confer with DIT as to which WB he is using in case you need to
unplug for a shot.
VTR Start & Stop (all 5 ways)
On the Lens (ENG)
On the front of Camera (Under the Lens)
On the RMB-150 (Upper right Button)
On the Microforce
On the Assignable switch (smart side bottom of camera)
Loading HD Tape Cassette
Push eject button on top of the camera under the handle.
Orange Door to the front and sprocket holes to the smart side.
Slowly press door closed.
***Always put at least 30 seconds of Color Bars and Sound tone
at the head of every tape.***
Recording: Step by Step
Attach Battery or AC Power supply.
Power Up the Camera (ON/OFF switch).
Push the eject button to open cassette carriage door.
Place tape in Camera. Insure record inhibit tab (li'l red square)
on tape cassette is flush with edge for record.
Set Timecode to Hour 01:00:00:00.
Set Proper color correction and ND for light being used.
Set or insure frame rate at 23.98psf.
Set Shutter Speed to ON and Insure it is at 1/48th (=180' Shutter
Angle).
Insure all necessary cables are plugged (the Engineer, Video controller,
or utility person may perform the task).
Set camera on Color Bars, (or ask engineer to do it from the RMB-150)
ask for Tone from Sound.
Push VTR (record) button to start recording and roll for :30 seconds.
Push VTR button again to stop recording. Tell sound you are "Clear".
Set camera DCC ON, Cam ON.
Now you have a picture and are ready to hand the camera over to
the Operator or DP to frame up the first shot.
I recommend visiting an HD Camera rental house and going over
these things to become more familiar with how this works before
you take that first HD job. Then have fun doing what you love to
do. Please feel free to share this with 1st and 2nd AC's that might
be interested. I look forward to seeing you on the set.
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Besides being a Master
Director of Photography, Sean
Fairburn is a national hero. He's been the only
US Marine combat director and cinematographer positioned
on the front line of the Iraqi War. Using a Sony's CineAlta
F-900 HD camera provided by Panavision,
Fairburn was able to obtain incredibly clear and realistic
footage that provides an inside look into war and offers
a valuable historical archive. Sean's master works have been
featured on countless US and International publications.
Please visit Sean
Fairburn's website for
detailed information. |
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