eltima electronic Jokie 2, Руководство пользователя

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Taking pictures with Jokie²
Taking pictures without reflectors
During the section The light beam
the blue area that is close to the
light barrier was described in detail
and how objects may serve as reflec-
tor.
Therefore, in situations where in-
stalling a reflector is difficult or even
impossible and where the distance
between light barrier and object may
be small, one can also do without a
reflector.
So, in this case, the reach of the
light barrier is strongly dependent on
the object´s ability to reflect.
Moreover, working without a reflec-
tor, the precision of the system is
not as high as it is with reflector ei-
ther. The reason for that is simply
that one cannot foresee which parts
of the object are going to reflect well
and which are not.
Nevertheless this operating mode can be highly attractive
– especially when working with small focal lengths and
thus with larger depths of field or when the objects are
small compared to the depth of field.
Table 7 shows the reflector´s possible reaches when using
the palm of one´s hand as reflector.
switch
position
small,
small
small,
large
large,
small
large,
large
Reach ca. [cm] 5 - 6 15 50 70
Table 7: Reach without reflector
22
© eltima electronic 2013
Image 22: working
without a reflector