GRASS VALLEY LDK 4000 ELITE -, Руководство пользователя

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LDK 8000 Elite/4000 Elite System camera User’s Guide (v1.01) 61
Chapter 5 - Video setup
5.4.3 Digital noise reducer
Although the CCD imagers of the camera have very low noise levels by nature, circumstances
may require extra video noise reduction. To do this, a user-definable digital noise reducer is
available in the camera.
Go to the
VIDEO
menu and select the
NOISE REDUCTION
item. Select one the presets 1 , 2 or
3 or Off to turn off the noise reducer. Preset 1 produces the lowest noise reduction while
preset 3 produces the highest. Try and select the best option for your situation.
☞
Note
☞
Note
High noise reduction may introduce unwanted artifacts in the image.
5.5 Optical filters
A neutral density filter and a special effect filter can be placed in the path of the optical signal to
modify the incoming light. The filters are selected via the
Filter switches at the top-front of the
camera. These filters can be used, for example, to control depth of field or exposure levels.
The camera does not need color optical filters to be able to white balance correctly. The range
of the auto-white balance is so wide (from 2500 K to 20000 K) that there is never any need to
use color filters to obtain the correct white. Rotate the switches to move the optical filter
wheels.
The lower, large filter switch has four positions:
The higher, smaller filter switch also has four positions:
The status of the filter wheels is displayed in the viewfinder for a few seconds. The ND/RE
indicator in the viewfinder lights when an ND (Neutral Density) filter is selected.
Position Filter
1 Clear
2 ND 1/4 filter (2 stops)
3 ND 1/16 filter (4 stops)
4 ND 1/64 filter (6 stops)
Position Filter
1 Clear
2 4-point star
3 6-point star
4 Soft focus