
SONY MSW-900 camera / MPEG IMX recorder.
The new MSW-900 camera has many of the features of the latest
Sony HDCAM cameras, in the affordable IMX tape format for standard definition
production. Great for television and DVD production, some have even suggested
that, due to the mild compression and 4:2:2 image, upconverted IMX footage can
even compare favorably with HDCAM originated material.
16:9 / 4:3 switchable, and capable of 30p (segmented frame) origination, recording
on the 50Mbps
4:2:2 P @ ML , I-frame IMX tape format, this camera is the ideal solution
for those looking for a good transition to the widescreen, HD future.
| Imager | 2/3 inch Power HAD EX CCD, 16:9 |
| Imager Configuration | RGB, 3 CCDs |
| Picture Elements | 1038 (h) x 1008 (v) (1 megapixel) |
| Spectral System | f 1.4 Prism System |
| Built In Colour Filters | A: 3200K Cross Star B: 3200K C: 4300K D: 6300K |
| Built In Neutral Density Filters | 1: Clear 2: 1/4 3: 1/16 4: 1/64 |
| Electronic Shutter Speed, Normal Mode | 1/100, 1/125, 1/250, 1/500, 1/1000, 1/2000 |
| Clear Scan Mode | 260 speeds from 60.1 to 7000 Hz |
| Extended Clear Scan Mode | 248 speeds from 30.4 to 58.3 Hz |
| Progressive Scan | 30p |
| Lens mount | Sony bayonet type |
| Sensitivity | 89.9% reflection chart, 2000 lux at f/11 |
| Minimum Illumination | .15 lux at f/1.4, 48dB gain |
| S/N ratio | -65 dB (typical) |
| Modulation Depth @ 5 MHz | 70% (16:9), 55% (4:3) |
| Registration | .05% or better for entire screen area |
| Geometric Distortion | None identified (excluding lens) |
| Smear | -140 dB (typical) |
| Viewfinder | 2.0 inch monochrome quick-start |
| Viewfiner Horizontal Resolution | 450 TV lines (16:9) |
| Recording Format | MPEG IMX (50 Mb/s 4:2:2 Profile @ Main Level) |
| Tape Speed | 64.467 mm/second |
| Playback/Recording Time | 60 minutes maximum (small cassette) |
| Sampling Frequency | Y:13.5 MHz, R-Y/B-Y: 6.75 MHz |
| Quantization | 8 bits / sample |
| Error Correction | Reed-Solomon code |
| K-Factor (2T pulse) | Less than 1% |
| Y/R-Y/B-Y Delay | 15 ns maximum |
| Sampling Frequency | 48 kHz |
| Quantization | 20-bit / 16-bit (switchable) |
| Frequency Response | 20 Hz to 20kHz |
| Dynamic Range | >85 dB |
| Distortion (at 1 kHz) | .08% maximum |
| Crosstalk (at 1 kHz) | -70dB maximum |
| Wow and Flutter | Below measurable limit |
The latest generation of CCD from Sony incorporates a second, internal lens above each pixel. The combination of two lenses allows more light to reach the sensor, increasing the effective sensitivity of the camera. It's actually more sensitive than the HDW-F900 24-frame HD camera! And a thinner insulation membrane has reduced smear of this IT sensor to a spectacular -140dB... Better than the FIT sensors of only three or four years ago. This 1-megapixel CCD (twice the pixel count of the top-of-the-line Digital Betacam DVW-790) is also capable of progressive scan at 30 frames per second - a fabulous look for television production.
Digital Signal Processing is performed through a new 12-bit AD LSI chip - the use of a single chip also contributes to a substantial power consumption saving - the MSW-900 requires only 27W, which means longer run times and battery life. (Digibeta cameras, by comparison, tend to use around 32W.)
Features included in the camera are:
Users can customize, not only the two user-assignable buttons on the side of the camera, but also the entire menu system. Menu items can be selected from any of the setup menus, and incorporated into customized user menu pages, so the camera operator no longer needs to page through several menus to get to the most commonly-used adjustments. The Memory Stick system allows storage and recall of camera setups. User Files, Scene Files, Lens Files, etc.
The MSW-900 can be switched to 30-frame progressive scan mode. The image is then recorded as a 30p Segmented Frame - that is, the progressive image is broken into odd and even fields for recording. On playback, the original 30p frames can be recovered, but no special equipment is required to edit 30PsF footage - the playback VTR will output it as a standard, interlaced image which retains the desirable "30p Look."
For NTSC television production, there are significant advantages to 30p, when compared to 24p. 24p cameras essentially imitate the traditional film "pulldown" sequence, which means that the editor either has to convert the footage back to 24p for editing, or worry about editing on the split frame. This is even more of a concern for special effects artists, who usually have to do a reverse-pulldown in their software to eliminate this problem. . With 30p origination, there is no pulldown to contend with, so post production is straightforward.
Use of the optional MSDW-903 Cache Card introduces two exciting new features:
CACHE RECORDING allows the user to select a cache of between 1 and 8 seconds... The signal is streamed from the camera to a buffer in the cache card before being recorded. So, if you set your cache for 4 seconds, when you hit "Record," you're actually starting the recording 4 seconds ago! (When you stop recording, the tape will continue to run for 4 seconds.) This is ideal for documentary production!
INTERVAL RECORDING uses the same card for time-lapse recording.
You can program the camera to record a certain number of frames whenever you
hit the "Record" button (like stop-motion animation), to record a
certain number of frames at set intervals; or, you can select the duration of
the actual event (Say, three hours) and the duration of the desired final tape
(Say, one minute) and let the camera do the math. The interval recording feature
fills the buffer first, then activates the tape transport and records the contents
of the buffer all at once; this minimizes wear-and-tear on the tape transport
and heads.
The camera uses 20-bit A/D conversion, resulting in extremely high-quality sound recording. 4 channels are available, and input-switching and monitor-selection have been improved to provide more flexibility.
One great feature is the ability to set the camera to sense when a source is plugged into the rear inputs (channels 1 & 2) and automatically switch to the rear inputs, regardless of the switch setting. For run-and-gun documentaries, this is another potential life-saver!
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