Ega Master 79789 Manual De Instrucciones página 47

However, the reliability of the image analysis function is dependent on the nature of the scene being
photographed. Images which contain little or no details such as edges (for example a blank wall) may be
indicated as blurred when they are in-fact acceptable. Therefore the user should bear this limitation in
mind when taking pictures, and it is suggested that users should take some practice shots to get a 'feel'
for the way in which this software behaves.
Note that the camera MasterEx intrinsically safe has an anti-shake function. It takes four pictures and
then selects the best quality one to save to the flash memory. This is the reason that the flash fires 4
times. This operates independently of the image blur analysis feature, which examines the best of the 4
images taken.
2.8.4 Variable flash brightness
The purpose of this feature is to reduce the incidence of over-exposure of images when close-up
shots of reflective surfaces are taken with the flash.
When the flash is enabled, and a shot is triggered, a short low-brightness 'ranging' flash pulse will
firstly be seen, immediately followed by the four flash pulses previously described. The camera MasterEx
intrinsically safe software rapidly analyses the reflected light level from the ranging pulse, and adjusts
the brightness of the flash accordingly. However, this system is not infallible, and so the flash may still be
too bright under some circumstances. The camera will indicate a bad image if the light level is extremely
high, but if you are trying to photograph text close-up on a reflective rating plate for example, it is strongly
recommended to use ambient lighting where possible in such applications.
2.8.5 Compatibility of the camera MasterEx intrinsically safe LED flash with optical flame
detection equipment
The flash LEDs fitted to the camera MasterEx intrinsically safe operate with a peak wavelength of
440nm (with a secondary lower peak at 550nm). Therefore the majority of the light emitted is towards the
blue end of the visible spectrum.
Typical UV/IR flame detectors operate in the 180-260nm UV range and the 2000-4000nm IR range.
Consequently the majority of the energy emitted by the flash on the camera MasterEx intrinsically safe is
well outside of the operating range of typical flame detectors.
However, the manufacturer has not done any testing of the camera MasterEx intrinsically safe with optical
flame detectors, so we cannot guarantee compatibility with any specific model of detector.
If you do find that particular sensors may be activated by the flash, it can be turned off by the user
with the press of a key as per the operating instructions in 2.8.1. In addition, if you require the flash to be
completely disabled for a particular camera, the manufacturer can send you a field-installable software
version which will disable the flash (this of course can be reversed as desired by re-installing the normal
software version, again in the field).
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