BioDocAnalyze (BDA) digital - Biometra

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Image Capture
3.2.3 The Card „Advanced“
Quality For choice of compression of picture data in JPG format. In general quality „normal“
will be sufficient. Quality „superfine“ with only low compression needs more saving capacity
and time for image analysis.
ISO For setting of the sensitivity. Value ISO 400 is recommended for low illumination and big
zoom, but in contrast to photos at ISO 50 a certain background noise appears.
In most cases it is advised to use ISO 50. Only for the acquisition of very faint signals at
high zoom factors it can be necessary to raise the sensitivity to ISO 400.
Flash For activation or deactivation of the flash. Applications with darkhoods should be done
with flash „off“. Flash „on“ or „auto“ can be used for photographs with stand in a dark
room, but reflections on the gel surface can not be excluded.
Exposure
Compensation
For setting an exposure correction. A fine-tuning of the optimal exposure can be done in
small steps.
This function is not available in shooting mode „Manual“ because lens aperture and exposure
time are specifically set in the manual mode.
White Balance For setting the white balance. Colors can be mirrored more true to original when the
illumination source is set. This factor is of only minor relevance for black&white photos.
Autofocus
Distance
For definition of distance where the autofocus will look for the sample. For image acquisition
with Biometra darkhoods „Close up“ has to be set. This setting will lead within the
limited distance of camera to gel to well-focussed pictures over the whole range of zoom.
Fig. 3-3 Card „Advanced“
BDAdigital Manual, Vers. 01_11