Jims Mobile, Inc. (JMI) - NGT-12.5 (f/4.5 12_ inch) Includes a 6-speed (0.3x/0.5x/2x/4x/8x/16x) dual-axis drive corrector, EV-2n focuser, 9x50 finder and NGC-microMAX as standard equipment.

Our popular computers allow you to easily guide to hundreds, thousands or even millions of objects in the database without knowing
where they are and without using a star chart. You don′t even need to level or polar align your scope. You can spend more
time observing and less time hunting for objects. These computers are sometimes called digital setting circles because the early
versions only displayed right ascension and declination, thus replacing the telescopes mechanical setting circles. The Next
Generation Computers (or MAX computers as they are sometimes called) are not ″Go-To″ computers in that they do not
move the telescope for you. 
JMI OUTFITS THE FOLLOWING TELESCOPES AND MOUNTS WITH ENCODERS FOR USE WITH OUR COMPUTER UNITS:

APM Giro-2 Deluxe ** Astro-Physics Super Polaris DX ** AstroSystems TeleKit ** Bausch & Lomb 4000, 8000 ** Cave Astrola
Standard*, Astrola Deluxe* * Celestron C5, C5+, C6, C8*, C8+*, C11, C14, Celestar 8, Celestar 8 Deluxe, CG-4, CG-5, CG-9.25,
CG-11, CG-14, CI-700, Classic 8*, Fastar 8, G-8, G8-N, G-9.25, Great Polaris, Polaris, Powerstar 8*, Star Hopper 6 / 8, Super C8*,
Super Polaris, Ultima 8, Ultima 9.25, Ultima 11 ** Coulter Odyssey 8 / 10.1 / 13.1 / 16 / 17.5 ** Criterion Dynamax 8 ** Discovery
EQ ** **JMI NGT-6, NGT-12.5, NGT-18 ** Losmandy G-9, G-11 (Product Inception-2002), GM-8 ** Meade 440, 628, 645, 826, 856, 880,
1060, 1266, 2040, 2045, 2045D, 2080, 2120, ETX-90 Astro, GEM, LX, LX3, LX5, LX6, LX10, LX50, LX100, LXD500*, MTS, Premier,
Starfinder Dobsonian 6 / 8 / 10 / 12.5 / 16, Starfinder German Equatorial (AC & DC) 6 / 8 / 10 (AC Only) 16 ** Obsession 15 / 18 /
20 / 25 / 30 / 36 ** Orion Atlas 8 / 10, Deep Space Explorer 6 / 8 / 10 / 12.5 / 16, EQ-3, EQ-4, SkyQuest XT 6 / 8 / 10, SkyView
Deluxe EQ, SkyView Pro EQ, Skywatcher 120, StarMax 127 ** Parks Astrolight, Superior 8 / 10 / 12.5 / 16 l Questar 3.5 l
Starsplitter II 12.5-30, Compact 10 / 12.5 / 14.5, GEM, Tube 8 / 10 ** Synta Sky-Watcher EQ4 (a few were aka EQ5) / EQ6 **
Takahashi EM-10, EM-200, NJP ** Tectron 15 **Tele Vue Gibraltar, Panoramic, Renaissance-101, Systems Mount ** Vixen Great Polaris,
Great Polaris Deluxe l Custom Installations are available for an additional cost.

READ THIS BEFORE ORDERING:

* Meade LXD500 installations are $50 higher than price shown. JMI NGT-6 installations are $90 lower than price shown. Some Cave
Astrola installations are priced as Custom Installations. See the special note regarding Celestron fork mounted C8 telescopes.

Please specify your telescope or mount make, model and year. Other information may be requested before the order can be filled.
For specific information requirements see document no. 12 in our Document Library.

JMI encoder and hardware systems (encoders and gears or pulleys/belts) are generally optimized to approximately 8000
tics-per-revolution on each axis. Some older guiding computers (e.g. Sky Wizard 2) are not able to handle the high resolution
without encoder errors. In these cases, please request a low resolution system . It should be noted that, based on our experience,
doubling the total resolution on each axis will place an object 10%-50% closer to the middle of the field of view depending on the
quality (orthogonality) of the mount.  Better quality mounts will see less improvement with the high-resolution encoders than
those of slightly lower quality. (Nothing will be able to overcome the defects of a poor quality mount.).

	

Features

    * Open truss Newtonian
    * Split-ring equatorial mount
    * Rotating nose assembly
    * Built-in azimuth adjusting plate for easier polar alignment
    * Compact size
    * Fast one-man assembly
    * Removable ring assembly allows greater disassembly with the largest component weighing 40 lb.
    * Sidereal, Lunar, Solar and King tracking rates with both Northern and Southern hemisphere operation
    * Dual control drive corrector with 0.3x / 0.5x / 2x / 4x / 8x / 16x correction
    * NGC-microMAX Computer digital setting circles
    * CCD autoguider compatible
    * Battery and AC power
    * Adjustable focal point
    * Snap-fit Serrurier truss rods
    * JMI's celebrated quality construction

Specifications

    Type:  Newtonian reflector
    Mount:  Equatorial split-ring
    Mirror:  12.5" f/4.5 Nova Optical Systems 2" thick Pyrex diffraction-limited enhanced primary (96% reflectivity), 2.6"
diagonal enhanced secondary
    Power:  12vDC operation with included adapters or optional battery pack
    Weight:  approximately 120 lb., the heaviest single component is 40 lb.
    Height:  64" assembled, 31" collapsed, Eyepiece height 59" at Zenith
    Width:  26"
    Depth:  29"
    Finder:  9x50 straight through

Standard Equipment

    Rotating Nose Assembly for comfortable viewing of any part of the sky.
    EV-2n Focuser. (upgrades available)
    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 (3).
    Split-Ring Equatorial Drive with 26" drive ring.
    3-Point Large-Cup Flotation Mirror Cell.
    Primary Mirror Dust Cover.
    Integrated Optical Encoders for use with a "MAX" computer.
    NGC-microMAX Computer digital setting circles with a 245-object database. (upgrades available)
    Drive Corrector with dual axis control, 0.3x / 0.5x / 2x / 4x / 8x / 16x correction, North/south hemisphere operation and CCD
autoguider interface (see warning).
    AC or DC Power with 110vAC/60Hz or 220vAC/50Hz (specify) wall transformer or 12vDC cigarette lighter adapter.
    Built-In Lifting Handle permits easy transportation.
    Latitude Adjustment with scale for fine adjustment of latitude setting.   Adjusts from 30º to 58º