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Attach Mounting Plate (purchased separately)
Several mounting plates are available for the 1200 mount. If you own more than one instrument, you may need more than
one plate. Follow the appropriate directions for the plate(s) that you have.
18" FLAT MOUNTING PLATE (FP1800)
This plate is 18" long and 7.5" at its widest point
in the center. The width of the plate tapers to 5.5"
at each end. Four pairs of keyhole slots that
measure 3.2" between centers are provided. The
two inner pairs are 13.75" apart and the outer two
pairs are 17" apart. You can drill additional holes
to suit your needs. This plate also fits the 900
German Equatorial.
Attach this plate with six 1/4-20 x 1" flat head
socket cap screws at the locations indicated by
the filled holes on the diagram.
15” RIBBED MOUNTING PLATE (1200RP15)
This plate is 14.75” long, 7.75” at its widest point
5” at each end and 1” thick. The underside of the
plate is carved into a ribbed pattern to maximize
the strength and minimize the weight - 3 lbs. A
pair of keyhole slots that measure 3.2” between
centers are provided at each end. The distance
between the pairs is 13.75”.
Attach this plate with six 1/4-20 x 3/4“ socket
head cap screws at the locations indicated by the
filled holes on the diagram. Note that the plate is
asymmetrical. Attach the plate so that the long
end points toward the sky.
24" RIBBED MOUNTING PLATE (1200RP)
For larger instruments, the ribbed structure
of this plate provides the maximum support.
Our machinist begins with thick aluminum
plate and carves a strong rib structure. The
final result is 1.5" thick, 24" long and 7.6" at
its widest point. The width of the plate
tapers to 5.5" at each end. A pair of keyhole
slots that measure 3.2" between centers are
provided at each end. The distance between
these pairs of holes is 23". Due to the ribbed
structure, you may not be able to drill
additional holes for non-Astro-Physics
mounting rings. The plate weighs an
amazing 9.5 lbs. for its size. This is a view of the rib structure on the underside of the 24" plate.
Attach this plate with six 1/4-20 x1" socket head cap screws at
the location indicated by the filled holes on the diagram.
DOVETAIL FOR LOSMANDY D SERIES PLATE (DOVELM)
This Astro-Physics plate attaches to the 400, 600E, 900 and
1200 mounts. If you already own one of the Losmandy DAP
series (fits Astro-Physics refractors), DC series (for Celestron
8", 11" or 14" SCTs) or DM series (for Meade 8", 10" and 12"
SCTs) plates, this is the mounting plate for you.
Attach this plate with four 1/4-20 x 3/4" socket head cap screws
and two 1/4-20x5/8" flat head socket cap screws at the
locations indicated by the filled holes on the diagram.
Diagram 9
Diagram 10
Diagram 11
Diagram 12