Mitsuboshi
Off-Axis Guiders
The Mitsuboshi off-axis guiders are designed to
be used in conjunction with a variety of popular
digital cameras and telescopes.
Use of an off-axis guider (OAG) eliminates
the possibility of differential flexure (e.g.
between guidescope and imaging scope) as well
as makes for a more compact arrangement, an
advantage for photo "expeditions."
These lightweight, 36mm thick units (see also new OAG7 Slim-profile units) are
specifically designed to handle full-frame, 35 mm sized
cameras (OAG5 model shown here) and large format digital imagers
such as the Kodak KAF-16803 (OAG6 model).
Rotatable interfaces on both sides of the OAG allow for
guide star selection without changing the camera's orientation.
Shown below is the M57-AD taper adapter.
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The radial position of the pick-off mirror is easily adjusted for
optical system parameters such as the internal diameter of the
telescope/camera interface, effective image circle of the optics, and
imaging sensor size. The distance of the pickoff mirror into the telescope's light cone may be adjusted between
17 and 34mm for the OAG5, and between 16 and 33mm for the OAG. Refer to the diagram below to see the mirror position adjustments.
The size of pickoff mirror is 12mm square with a guide
port diameter of 11mm, making the effective autoguider opening 11mm.
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