Dual cooling fans move filtered air around the primary mirror and through the optical
tube to accelerate thermal stabilization of the optics. This reduces the effect of tube
currents which can degrade seeing conditions.
The Hyperion uses a 3.5” Feathertouch Focuser for precise focusing. The focuser is
automated using Starizona’s MicroTouch autofocuser. The Feathertouch has 4.5”
(115mm) of focus travel and tick marks on the side of the focuser drawtube indicate the
current travel of the focuser in mm. The Hyperion has 7.33” (186mm) of backfocus from
the racked-in focuser drawtube to the focal plane. This distance does not include the
thickness of the focuser adapter, which varies by camera, but is approximately 1”
(25mm) thick.
