The Sony MSW-900


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.


MSW-900 Camera Specs

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)

 

VTR Specs

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

 

Sound Specs

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

MSW-900 Features

Power HAD EX Sensor CCD

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

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:

 

Menus & Memory Stick

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.

 

Progressive Scan Mode

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.

 

Cache/Interval Recording

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.

 

Audio Features

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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