Mode

Shutter speed

Application

 

 

ECS

DNW-90/90WS: 248

For shooting subjects such as

 

 

(Extended

speeds in the range of 30.4

monitor screens with vertical

 

 

Clear

Hz to 58.3 Hz

scanning frequencies of up to 60

 

 

Scan) (For

DNW-90P/90WSP: 295

Hz (DNW-90/90WS) or up to 50

 

 

DNW-90/

speeds in the range of 25.4

Hz (DNW-90P/90WSP), to obtain

 

 

90P/90WS/

Hz to 48.7 Hz

images with no horizontal bands

 

 

90WSP

 

of noise.

 

 

only)

 

 

4

 

 

 

 

 

 

 

 

EVS

DNW-7/90/90WS/9WS: 1/

Improved vertical resolution. In

 

 

(Enhanced

60 sec. (automatic setting)

the case of the DNW-7/7P/9WS/

 

 

Vertical

 

 

9WSP, the sensitivity of the CCD

 

 

 

DNW-7P/90P/90WSP/

 

 

Definition)

is reduced to half.

 

 

9WSP: 1/50 sec.

 

 

 

 

(automatic setting)

 

 

 

 

 

 

 

Notes

•Whatever the operating mode of the electronic shutter, the sensitivity of the CCD decreases with increasing shutter speed.

•When the automatic iris is used, the iris opens wider and wider as the shutter speed increases, thus reducing the depth of field.

•Under artificial light, particularly fluorescent or mercury lamps, the light intensity may appear to be constant, but the strengths of each of the R, G and B colors are actually changing in synchronization with the frequency of the power supply (“flicker”). Using an electronic shutter under such lighting could make the flicker even worse. Color flicker is particularly likely to happen when the power supply is 60 Hz (with the DNW-7/90/90WS/9WS) or 50 Hz (with the DNW-7P/90P/90WSP/ 9WSP). However, if the power frequency is 50 Hz (DNW-7/90/90WS/ 9WS) or 60 Hz (DNW-7P/90P/90WSP/9WSP), setting the shutter speed to 1/100 or 1/60 can reduce this flicker.

•When a bright object is shot in EVS mode or ECS mode (DNW-90/ 90P/90WS/90WSP only) in such a manner that it fills the screen, the upper edge of the picture may have poor quality because of an inherent characteristic of CCD. Before using EVS mode, check the shooting conditions.

4-12Chapter 4 Adjustments and Settings for Recording