e_hd250.book Page 9 Tuesday, October 24, 2006 3:11 PM
Condensation
•If this device has been cooled down in a cold place and is then carried to a warm place, the moisture contained in the warm air may adhere to the head drum or tape guides and be cooled into water droplets. This phenomenon is referred to as condensation (dew). When this occurs, the head drum and tape guides are covered with droplets allowing the tape to be stuck to them, leading to tape dam- age.
eocassette, place this device in a tightly sealed vinyl bag, and then move it to a new environment.
To ensure no condensation occurs, allow the temperature of this device in the bag to reach that of the new environ- ment before using it.
Characteristic CCD Phe- nomena
Smear and Blooming
Due to the physical structure of a CCD it is possible to induce
•Condensation occurs in the following cases:
• When this device is suddenly
moved from a cold place to a warm place.
• When a room heater has just started or when this device is exposed directly to cold air from an air conditioner.
•When this device is placed in a very humid place.
Head drum
Video tape
vertical streaking (called “smear”) when shooting an extremely bright light source. Another effect is the expansion of light around a bright light or object (called “blooming”).
The CCD employed in this device is characterized by induc- ing very little smear or blooming. Nevertheless, please take note that smear or blooming may be induced when shooting a bright light source.
Smear
Vertical pale streaking appearing at high luminous object
Do not leave the videocassette inserted when moving the camera under conditions where the temperature environ- ment changes.
After moving this device, do not use until the internal parts have stabilized.
•“CONDENSATION ON DRUM” is displayed on the LCD monitor and in the viewfinder when condensation occurs in this device.
Keep the power on until the warning message disappears. If the power is turned off while the warning message is dis- played, condensation may remain in the device even if the warning message is not displayed. Wait until this device is completely dry before using.
•Pay attention to condensation even before the condensa- tion indication appears.
As condensation forms gradually, the condensation indica- tion may not appear for the first
In an extremely cold place, the condensation could freeze and turn into frost. In such a case, it takes an additional 2- 3 hours for the frost to first melt into condensation and then to be dissolved.
•To prevent condensation
When moving this device from one place to another where the temperatures are greatly deferent, first remove the vid-
High luminous object (Electric light, sunlight, etc.)
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Moire or Aliasing
Shooting stripes or fine patterns may cause a jagged effect or a banding in fine mesh patterns.
White dots
High temperatures can cause CCD sensor pixels to produce the effect of white dots in the image. This condition is con- spicuous especially when gain is applied.
This is a characteristic of the
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