User guide | 21
English
Dark frames
What does a dark frame do ?
In digital photography taking a dark
frame is the process of recording an
image without signal and noise. Doing
so improves your observations and the
quality of the images you save. A dark
frame allows the eVscope 2 on-board
computer to analyze and correct any hot
pixels or other image imperfections.
How to take a dark frame ?
To take a dark frame, keep the cap cover on the eVscope 2 and make sure you are in
dark surroundings. Don’t expose the eVscope 2 to direct streetlight.
Scan this QR code to be redirected to our FAQ
with more visual content on how to take a dark
frame
Open the User > My eVscope section, select "Take Dark Frame".
If successful, the message "New Dark Frame Created" should pop up at the bottom of
your smartphone screen. If an error message appears, try again later, possibly in a darker
environment (there might be too much light detected on the image).
Noise can occur during a long exposure
or with high temperature variations.
You may see the eff ects of it with
the emergence of hot pixels on your
images (red, blue or green spots).
Did You
Know ?
How often should you take a dark frame ?
Dark frames can be taken at any frequency you like. As a minimum we recommend
taking one in the winter and one in the summer (changes in temperature and altitude
can create conditions for imperfections in images). A dark frame should also be taken
prior to every scientifi c observation.
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