P r i m a L u c e L a b i S r l
E SAT TO u s e r m a n u a l
Application example: ESATTO with refractor telescopes
Thanks to the many available adapters, you can easily
use ESATTO as the new focuser for refractors and improve perfor-
mance, especially in astrophotography. Refractors, and especially the apochromatic models, are perfect instruments for
astrophotography since they haven't a very long focal length (you can use them for very long exposition times also with
affordable mounts) and they combine very good performance with easy of use.
But many refractors use a focuser that
may not be able to adequately support your camera and the accessories used in astrophotography: let's see how you can
improve your refractor telescope by replacing the
focuser with ESATTO.
Some of the problems you may have with standard
focuser
Astrophotography, especially the one aimed at deep-sky objects, requests not only for specialized cameras (usually with
large sensors and with a cooling system) but also for many
accessories like large motorized filter wheels. When you have
such a large
"imaging train", the first thing to consider is its weight: in fact most of the refractors (especially the ones with
an affordable price) are not provided with the weight load capacity that is needed to perfectly keep the camera in the fo-
cus position during the long exposition times requested in astrophotography, especially when the telescope is pointed to
the zenith (the vertical position). If your focuser has not enough weight load capacity, your camera and
accessories will
slip and will bring your sensor
out of focus.
But if we use
ESATTO
as focuser for refractors,
we'll have a high weight load
capacity and you will be able to use also heavy imaging trains.
If the imaging train weight is higher than focuser's load capacity, the image train may slip during the imaging session.
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