ATW Auto Tracking Balance, FLC Flickerless mode

ton is turned on. ATB is most suitable for environment with little change in light source.

ATW – Auto Tracking Balance

MODE NARROW (darkness adjust- ment)

WIDE (Light adjustment)

ATW functions by detecting white color in the scene at a color temperature from 3200 to 10000 Kelvin.

The color temperature is being moni- tored continuously and the white bal- ance is set automatically by internal controller.

ATW is most suitable for viewing objects with changing color tempera- ture and which can make the picture color look more natural. This mode is also helpful in light polluted skies.

ALC/AES

ALC – Auto Light Control

SHUTTER

Figure 7. ALC Shutter speed menu.

Figure 8. Sense Up menu.

FLC – Flickerless mode

ON or OFF

Flickerless mode is used for suppressing the flicker of light (illuminating the cap- tured scene) produced depending upon the frequency of the power source. In 50Hz area, the CCD exposure time is 1/50sec and if NTSC camera is used with working frequency of 60Hz, there will be flicker on the screen. Same will happen in using PAL camera in a 60Hz area. The shutter speed is fixed to 1/100 sec for the 50 Hz area and 1/120 sec for the 60 Hz area to reduce the flicker of the fluo- rescent light.

Note: FLC is not normally used for astronomy.

AGC – automatic GAIN Control

ON or OFF

The AGC function provides a clear image in low light condition. This controls an amplifier that is used to boost the video signal when the light dims so as to increase the camera’s sensitivity. Normally AGC will be turned OFF for Lunar, Planetary, Solar (with full-aperture solar filter) and Terrestrial imaging and turned ON for low light deep space objects.

SENSE UP

OFF, x2, x4, x8, x16, x32, x64, x128, x256

Sense-Up: An image processing technology which allows user selectable digital slow shutter speeds in order to allow extra light into a camera thereby providing higher sensitivity in low light conditions (Figure 8). The minimum frame integra-

OFF, 1/100, 1/250, 1/500, 1/1000, 1/2000, 1/4000, 1/10000

Automatic Light Control (ALC) indicates the image sensor’s ability to automati- cally adjust in diverse lighting conditions to yield the most vivid video image pos- sible (Figure 7). Shutter speeds can be selected for Terrestrial, Lunar, Planetary and Solar (with full-aperture solar filter) imaging.

For low light deep space objects SHUTTER should be turned OFF.

AES – Auto Electronic Shutter

AES is used when a manual or fixed iris lens is fitted and the shutter speed will respond to the amount of light to keep the signal output at optimum level. AES allows changing the iris level automatically without using the auto iris lens.

Note: The AES should be switched off when an Auto Iris Lens is fitted. AES is not normally used for astronomy.

tion (x2) is 1/32 of a second for NTSC (1/40 for PAL). The maximum frame inte- gration (x256) is 4 seconds for NTSC (5 seconds for PAL).

Set SHUTTER SPEED (ALC) to OFF for frame integration.

For bright solar system objects such as moon, planets sense up would be set at a minimum or off.

Low light objects such as galaxies and nebulae require a high value sense up setting such as x256 which gives a total exposure time of up to 4 seconds NTSC (5 seconds PAL).

BACK LIGHT – Background Light Compensation

Background Light Compensation is used when there is a very bright background with very dim front image.

Note: BACK LIGHT is not normally used for astronomy.

52185, 52186 specifications

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