I am using a Canon Ixus 850 IS with a self-written basic script to take pictures for a time lapse of around three month. After two weeks and more than a thousand pics I figured out that only half of the pictures are in focus.
The focus issue does neither match with the aperture (the camera has two apertures of 2.8 and 7.1 and by default selects automatically depending on available light), the scene brightness nor with anything else I am able to reconstruct.
To avoid exactly these kind of focus problems my script consists of the following, reduced to the very basic:
print "Lock autofocus"
print "Set focus to infinity"
set_prop 11 3
print "Take a test shot"
if get_bv96 > -505 then
Does anyone know how to really set the fixed focus, ideally to infinity and with an aperture of 7.1 all the time?
Thanks a lot,