| High
Definition – Sony HDW 750P features
1080
lines resolution x 1920 pixels - 16:9 frame
Dedicated HD cine style T2.1 Canon zoom lenses
25P Progressive or 50i interlaced recording modes (switchable)
Downconverter board for added SD-SDI output and standard definition alongside
HD-SDI outputs
Established 1/2" Betacam tape format
3 x 2.2 million pixel FIT CCD’s
Picture cache board records up to 7 seconds loop footage even before the
record button is pressed
True time lapse
Menu driven set up with up to 5 parameters of camera look stored on memory
stick
(not compatible with HDW F900 camcorder)
Dial in colour temperature control
Incredibly compact and lightweight – only 5.4Kg with viewfinder
and battery
Instant playback
Camera rated at 630
asa progressive and interlaced at 1/25th
second shutter (360 degrees)
315 asa
with shutter set at 1/50th, 180 degree, progressive scan
Latitude
around 8 - 10 stops
Tape run 25P = 48 min's, 50i = 46 min's (40 minute tape)
Frequently
asked questions about HD
What
is interlaced(i) and progressive(p or psf) scanning?
Interlaced
scanning requires two fields of alternate lines being inter-weaved to
create a standard frame. This is done in two passes with the odd numbered
lines being done first followed by the even ones in the second pass.
A progressive image effectively scans the whole image sequentially in
one pass to create a frame.
Progressive scanned images have a higher resolution and less motion blur
than interlaced ones and generally have a more filmic look about them.
What
formats can the HDW 750P shoot?
The 750 has an option for shooting two formats. 50i and 25P both of which
orientate around the mains frequency of 50Hz.
Why
shoot high definition?
By its nature HD produces images that are different. It fits in a niche
market where film might not be affordable or Digi Beta might not be good
enough. HD is not film and never will be. It is an electronic medium as
opposed to the analogue chemical look of film, and has impressed facilities
and production worldwide. Images shot on HD certainly look richer, sharper
and more real with a depth to the picture that video has previously never
had.
Can
you use normal lenses on HD?
You can use normal lenses although the full benefit of HD will not be
accomplished. There are particular issues regarding resolution and chromatic
aberration that are better resolved with the use of dedicated HD lenses.
What monitors can I view the pictures on?
Our HDW 750P comes with the HDW-702 converter board, so the pictures can
be viewed on HD monitors that resolve HD-SDI inputs. Additionally pictures
can be viewed on a standard PAL monitor or any monitor that handles standard
SDI.
It is highly recommended to use some sort of HD monitor on a shoot to
see the benefit and handling of the camera.
What
monitors can I view the pictures on?
Our HDW 750P comes with the HDW-702 converter board, so the pictures can
be viewed on HD monitors that resolve HD-SDI inputs. Additionally pictures
can be viewed on a standard PAL monitor or any monitor that handles standard
SDI.
It is highly recommended to use some sort of HD monitor on a shoot to
see the benefit and handling of the camera.
What
benefits are there from the picture cache board?
Our HDW 750P comes with the HDW-703 picture cache board. This allows up
to 7 seconds of loop recording using solid state memory. When the record
start button is pressed, everything that happened 7 seconds prior can
be recorded to tape. Ideal for shooting unpredictable subjects such as
children, animals or cars. The board also allows true time lapse via manual
settings or just dial how much footage you want over a period of time
and the camera works it out. All the frames are stored in the cache and
downloads it in bulk saving the camera mechanism excess wear.
Can
you use a ccu box with the 750?
An RM-B 150 remote ccu plugs directly into the HDW 750.
Why does there seem to be judder whilst panning, when shooting progressive?
When shooting in 25P mode there will be 1/25th of a second between frames.
If the camera is panned too fast there will be more subject movement between
frames resulting in judder. In 50i mode (interlaced), you will be able
to pan twice as fast as in 25P mode without judder i.e. motion blur between
fields creates a smoother image.
What
is 3:2 pull down?
This is a technique to transfer 50i (25 frames per second) to 60i (30
frames per second) signal. Every fourth field is repeated to make up for
the missing fields.
How
do I edit my HD rushes affordably?
If the finished film or programme is not for projection or HD transmission,
there is no need to stay in the HD domain. Transfer the rushes as you
would digi Beta rushes onto non-linear edit systems etc… and treat
the programme as a standard definition one. The benefit of HD acquisition
will still be gained by shooting HD as would a feature transferred from
16mm or 35mm and viewed on a television.
Keep your EDL for future proofing, if an HD master needs to be cut.
Does
a shutter have the same effect when shooting progressive?
When shooting 25P, each frame will normally be exposed for 1/25th of a
second assuming no shutter is introduced. In a film camera shooting 24
fps, a 180 degree shutter means that each frame is exposed for half the
time i.e. 1/48th of a second.
You can simulate the exposure of film by choosing to introduce a shutter
exactly twice that of the frame rate chosen. If shooting 25P, a 1/50th
shutter will re-create the motion effect of a film camera running at 25
fps with a 180 degree shutter.
This is not applicable to interlaced formats.
Can
I shoot 4:3?
4:3 cannot be selected as an aspect ratio in the menu, therefore it can
only accomplished by setting 4:3 viewfinder markers in the menu. and framing
accordingly.
|
