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400 QMD GERMAN EQUATORIAL MOUNT
TIGHT, COMPACT STRONG, SMOOTH, SOLID PERFORMANCE
The two most important considerations in mount design and
construction are maximum strength/rigidity for a given size and
accuracy of the drive system. Without this basic foundation, all other
features of a mount are just superfluous frills. The Astro-Physics 400QMD
Equatorial was engineered to be a compact, firm platform for your
high resolution instrument. Whether your interests are purely visual
or include astrophotography, a steady image in the eyepiece or
camera viewfinder is extremely important.
The 400 is constructed of the highest quality components to provide
you with years of observing pleasure. All parts are precisely
machined on our computerized CNC lathe and machining center
using solid or thick wall aluminum and stainless steel. Machining
tolerances are very high to achieve a tight, solid fit of all
components. There are no thin wall, weak, porous die castings as in
most other mounts of comparable size. Astro-Physics avoids the use of
any carbon steel shafts or plated steel fasteners because they will
deteriorate with time. This mount will not rust or bind up and will
retain its appearance and function throughout the years.
Both axes respond to fingertip pressure with unparalleled
smoothness. Built-in clutches can be disengaged for ultra-smooth
sweeping or locked for astrophotography. The worm gears, motors
and drive components are enclosed to protect them from dirt and
dust. With the 105 Traveler telescope, the 400 mount damps out
in one second when mounted on the lightweight aluminum tripod.
Your 400 mount can grow with your skills and interests in
astronomy. You can enjoy the visual pursuits of astronomy with the
mount as it is, or enhance your ease of locating objects with our
optional encoders and JMI digital setting circles. If you plan to take
astrophotos, you will be pleased with the solid stability and inherent
accurate tracking capability of the drive system. The hand controller
contains a plug-in for the Santa Barbara Instrument Group (SBIG)
ST-4 or ST-6 Star Tracker/imaging Systems. Either of these options
will allow you to auto-guide astronomical photos and explore CCD
imaging. Please refer to the information sheets that describe these
options more fully.
When coupled with the options described separately, the 400
German Equatorial mount will be your portable observatory. This
handy mount can be lifted easily into your backyard, packed
conveniently into your car or carried aboard an airliner for travel to
another hemisphere.
FEATURES
- Precision machined aluminum with radiused edges
- Gears and motors are fully enclosed
- Gear in declination axis allows full 360 degree continuous rotation;
scope can move through zenith for photography
- 2.5" (6.4cm) hollow right-ascension and declination shafts maximize
strength at minimum weight
- Large UHMW thrust bearings form ultra-stable thrust surfaces for tremendous rigidity
in a small package
- Right-ascension shaft threaded for optional polar scope allows quick, accurate polar
alignment in the field
- Removable stainless steel counterweight shaft for compact storage
- Engraved setting circles with Porter Slip Ring Design; polar axis ring is driven;
it follows the stars without needing to be reset each time you look at a new object
- Fine altitude and azimuth adjustments for quickly and accurately zeroing in on the
pole in the field
- Black anodized finish will retain its lustrous beauty for years
SPECIFICATIONS OF EQUATORIAL
HEAD |
Worm wheel: |
3", 192 teeth fine pitched bronze wheel |
Worm gear: |
stainless steel |
Latitude range: |
0 to 66 degrees |
Azimuth adjustment: |
approximately 25 degrees |
Azimuth adjustment: |
Porter Slip Ring design |
Right ascension: |
10 minute increments, pointer engraved both
Northern/Southern |
Declination: |
1 degree increments, pointer will accommodate refractors
up to 5" reflectors to 6", Cassegrains to 8" |
Weight of equatorial head: |
20 lbs (9.1 kg) |
SPECIFICATIONS OF MOTOR DRIVE SYSTEM
- High-resolution stepper motors in both axes
- Lightweight, palm-sized controller
- Quartz control
- Periodic Error Control and Declination backlash control circuitry
- R.A and declination reversing switches for correct object orientation and movement in eyepiece
- Power output to plug in guiding reticle or other accessory
- Adjustable brightness control for guiding reticle
- Plug-in for SBIG Models Star Tracking Autoguiders
Drive rates: |
Sidereal, solar, lunar |
Guiding/slewing rates: |
0.25/0.5/2x/8x/16x |
Hemisphere: |
Switch for Northern/Southern |
Power Consumption: |
0.45 amps at normal rates |
Power requirements: |
12 VDC |
Suggested power sources: |
Portable battery pack, auto battery, power inverter for 110
volts |
AVAILABLE OPTIONS
Please see the accompanying information sheets for descriptions:
- Sturdy, adjustable Hardwood Field Tripod with shelf and carrying case
- Lightweight aluminum adjustable field tripod
- Mounting Plates, and Dovetail Quick Release Hardware
- SBIG ST-4 or ST-6 CCD Star Tracker/Imaging System
- Portable Pier - 6" dia.,- heights 48", 54" or 62"
- 12 Amp-hr, 12 Volt Rechargeable Battery Pack
- Stainless Steel Counterweights- 6 lbs., 9 lbs.
- Astro-Physics Encoders for Digital Setting Circles
- Integral 5X Polar Axis Finder Scope with Illuminator
- Digital Setting Circles / Aids to Celestial Navigation
- Mounting Rings
- Carrying Cases (up to ATA - Airline Transport Assoc. approved)
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