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With Refractors
This system is designed for use in a Refractor that uses a 1.25" star diagonal. It also includes a machined adapter called Part T
that allows the 1.25" Refractor OCS Cell to be carried by a 2" star diagonal. Both the 1.25" and 2" star diagonals must have
filter threads on their telescope side tubes. The patent pending Power x Switch allows any Refractor to operate at two instant
magnifications though some focus adjustment is necessary. With the Power x Switch Arm "IN", the magnification will be 1.25X and
with the Power x Switch Arm "OUT", the magnification will be 2.5X. These factors will be somewhat higher if a 2 star diagonal is
to be used.
Coronado Filters
The Refractor OCS Cell may also be used in Coronado Blocking Filter Diagonals. These BF diagonals have filter threads on the
telescope side and the Refractor OCS Cell must be installed when the binoviewer is used or focus will not be possible. The
binoviewer with Power x Switch can then be loaded in the front of the Coronado Diagonal for H-a use. Operation is essentially the
same as with night use in a refractor. Note: The Refractor OCS Cell must be used at all times in either the 1.25" Coronado Star
Diagonal or focus and Power x Switching will not be possible. When using a Solarmax90 Telescope®, the 1.25" Refractor OCS Cell is
unnecessary because that telescope has a special shortened tube designed to allow the Denkmeier Binoviewer to reach focus (see S&T
Magazine Maxscope 90 Hot Product description in Jan 2004 issue).
With SCTs
This Package also operates with any SCT. F/10 SCTs will be capable of achieving .66X focal reduction with the Power x Switch in
the IN position. With the Power x Switch Arm in the OUT position, magnification will be 1.15X due to the interaction of the SCT
primary and Secondary mirror. If 2X is desired, the Refractor OCS Cell may be threaded to the binoviewer nosepiece which is
threaded for 1.25" filters as well as the OCS Cell. In this way, 3 magnifications are possible when using the Standard Refractor
Power x Switch Package on SCTs. In the event that an unusual SCT which does not provide an ample amount of back focus is to be
used, it may be necessary to use this package in the same way that it is used for refractors. This means that the Refractor OCS
Cell would need to be used in the SCT diagonal filter threads at all times for focus to be achieved. Focal reduction would not be
possible in this case. For the major brands of SCTs, use of the OCS cell in the diagonal will not be necessary.
With Maks, Classical Cassegrains, Mewlons, Tec Maks
With any telescope that uses a star diagonal but cannot provide the back focus necessary for the binoviewer to reach focus, the
system is essentially used in the same way as it is with a refractor. Scopes like Takahashi Mewlons®, TEC Maksutovs®,Classical
Cassagrains, and Tal Klestovs require the system to be used as if these scopes were refractors. Just follow the refractor
instructions and remember that the OCS Cell must be installed in the star diagonal at all times.
When using telescopes like Questars®, Meade ETX90 and 125s®, Meade Maksutovs, Orion® Maks, Intes Micros® and some others, the
OCS cell should not be installed. Focal reduction is possible using the Power x Switch in these telescopes and because of the long
focal length and small relative aperture of many of these designs, reduction may be very desirable. Our Patent Pending Power x
Switch contains the Star*Sweeper and taking advantage of this feature will no doubt prove attractive to you. With the Power x
Switch Arm in the OUT position, normal magnifications will result and by adding the OCS cell to the binoviewer nosepiece and
keeping the Power x Switch Arm in the OUT position, 2X magnification will result. These magnification factors are in comparison to
magnification using the same eyepiece as a single the telescope with no binoviewer.
With Newtonians
If a Newtonian telescope is added and this package is owned, an additional middle spacer tube may be purchased that will allow
the Newtonian to be used. This item called The 1.25" Newtonian Spacer Tube (or formerly Part C) is priced at $29. It threads to
the 1.25" nosepiece and then the 1.25" Refractor OCS Cell is threaded to the opposite end of this Newtonian Spacer Tube. The Power
x Switch will then be functional and a Newtonian will reach focus at a low and high magnification.
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