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JMI 18" NGT Telescope



  • Model: NGT18
  • Manufactured by: JMI


JMI 18" NGT Telescope

  • Open truss Newtonian
  • Split-ring equatorial mount
  • Rotating nose assembly
  • Compact size
  • Fast assembly
  • 18-point flotation mirror cell
  • Includes StellarCAT ServoCAT Jr. Track/GOTO compatible with Go-To computers and planetarium software
  • NGC-superMAX (Argo Navis™) Go-To computer
  • CCD Autoguider compatible
  • Battery and AC operation
  • Adjustable focal point
  • Snap-fit Serrurier truss rods
  • Massive 2" declination ball bearings
  • Personalized name plaque
  • JMI's celebrated quality construction

Type:  Newtonian reflector
Mount:  Equatorial split-ring
Mirror:  18" f/4.5 enhanced primary, 4" enhanced diagonal secondary
Power:  12vDC operation with lead-acid batteries or adapter
Weight:  approximately 245 lb., the heaviest single component is 75 lb.
Height:  80" assembled, 30" collapsed, Eyepiece height 76" at Zenith
Width:  36"
Depth:  30"
Finder:  9x50 straight through

Standard Equipment
Rotating Nose Assembly
for comfortable viewing of any part of the sky.
EV-2n Focuser with Motor for motorized focusing. 
Extension Tube for 2" Focuser.
25mm 1.25" Plössl Eyepiece.
9x50 Finder Scope
(straight-through) with dovetail mount.
Piggy-Back Camera Mount for piggy-back photography.
Off-Axis Counterweight for attaching to the piggy-back camera mount (2).
Serrurier Truss Rods snap fit into heat treated, spring steel cavities.
Adjustable Focal Point including three different nose assembly mounting positions for visual and photographic work.
Sliding Counterweights positioned along the truss rods for fine tuning the balance (4).
Split-Ring Equatorial Drive with 36" drive ring.
18-Point Flotation Mirror Cell.
18" Mirror.
  A precision annealed 2" thick Pyrex diffraction-limited primary mirror with enhanced coating giving 95-96% reflectivity.
Primary Mirror Dust Cover with Two F-Stops providing 3" and 6" apertures.
Mirror Cooling Fan with filter and grill.
Integrated Optical Encoders and a StellarCAT tracking, slewing and Go-To system.
NGC-superMAX (Argo Navis) Computer digital setting circles with an over 29,000-object database and too many features to list here.
Battery or AC Power with 12vDC 4.6A rechargeable lead-acid batteries, audible low battery alarm, 12vDC cigarette lighter adapter and 110vAC/60Hz or 220vAC/50Hz (specify) wall transformer.
Built-In Lifting Handles permit easy transportation.
Latitude Adjustment with scale for fine adjustment of latitude setting.  Adjusts from 30º to 55º. 

* Telescope prices are for the standard telescope configuration.  

Manufacturer Info

Orion Telescopes