P r i m a L u c e L a b S . p . A .
E AG L E 4 U s e r M a n u a l
The EYE sensor measures the darkness of the night sky in mag/arcsec
2
values this means than typical readings of the
night sky will range from 18 (corresponding to a polluted night sky) to 22 (corresponding to a very dark sky with no light
pollution) usually. The EAGLE EYE sensor is sensitive only to visible light since, behind the lens, there is a UV/IR cut filter
and every EYE sensor is calibrated in PrimaLuceLab laboratory in order to consider temperature variations (thanks to a
temperature sensor integrated in every EAGLE case) and by using a special light meter.
Based on the sky darkness, the reading time of the EYE value will change. Under light polluted sky, the EYE value will be
displayed in a few seconds. Under very dark night skies, it will take up to a few minutes. In order to have a precise reading,
avoid any light to one pointed against the EYE lens and activate EAGLE’s DARK mode.
The small amount of internal heat generated by the EAGLE’s processor reduces the possibility of dew formation on the
small lens. During storage please remember to close the EYE lens with the provided cap and never point the EYE sensor at
the Sun. If you’re imaging the Sun, please keep the provided cap on the EYE lens.
- DARK mode
DARK mode feature that allows you to instantly turn off all the LED lights on the EAGLE. Not only this will prevent any
influence on your telescope but it is also a great feature for your astronomy friends that may be close to you while enjoy-
ing the night sky together. Thanks to the new DARK mode, the EAGLE is now a welcome guest at star parties where stan-
dard computers may be prohibited because of uncontrolled light emissions from LEDs and screens (the EAGLE doesn’t
need for a screen to operate). In order to activate DARK mode, please select ON in the bottom-left switcher of the EAGLE
Manager interface. All the LED lights of the EAGLE will turn off and the EAGLE Manager interface will become darker.
p a g e 4 8
Image 43: The EYE sensors in EAGLE Manager interface
DARK
mode
