NGC-MAX 12,046 Object aiming computer complete installation (specify telescope)

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The JMI NGC-MAX aiming computer is a very accurate set of digital setting circles with a database of 12,046 unique deep space objects and stars that it can guide you to and/or identify. An RS-232 port in the control box/display allows the system to communicate with your laptop computer or PC, should you want expanded database capabilities. In addition, its constantly-updated right ascension and declination display helps you locate deep space and solar system objects by their celestial coordinates alone.

The NGC-MAX acts as a stand-alone computer to guide you to objects in the sky, telling you which way to manually move the telescope to find the objects, but it will not move the telescope for you. It is not a “go-to” computer. As with all the JMI NGC aiming computers, the NGC-MAX does not require you to level or polar align your scope to operate, and it can be used with Dobsonian (altazimuth mount) scopes. A polar alignment help subroutine in the computer is available should you want to do a precise polar alignment of an equatorially-mounted scope for astrophotography.

The NGC-MAX comes with a control/display box, right ascension and declination encoders, and the correct mounting hardware to connect the encoders to your specific telescope. Also included is an instruction manual, a how-to-do-it VHS video tape, and a computer mounting bracket to fit your particular scope. A list of the telescopes that can be used with the NGC-MAX is at the bottom of this copy. When ordering your NGC-MAX, please specify the manufacturer of your telescope or mount, the model, and the year it was made. Other information may be requested before the order can be filled.

The encoder and hardware systems (encoders and gears or pulleys/belts) are generally optimized to approximately 8000 tics-per-revolution on each axis. This is a higher resolution than competitive aiming computers, and generally places an object 10%-50% closer to the middle of the field of view than competitive systems. Right ascension and declination readout accuracy depends on the quality (orthogonality) of your mount. Better quality mounts will see less improvement with the high-resolution encoders than mounts of slightly lower quality. (Nothing can overcome the defects of a poor quality mount.)

The compact battery-operated control/display box measures a handy 5.75” long x 3.6” wide x 1.44” deep. It is powered by a single 9 volt transistor radio battery that fits into the control box. In addition to a constantly-updated display of the right ascension and declination coordinates at which your scope is pointing, the NGC-MAX includes several lists of objects it can locate for you. These include all 110 objects in the Messier catalog and all 7,840 objects in the NGC catalog. Also included is a partial IC catalog consisting of all IC objects which are not galaxies, galaxies which have a magnitude specified, and all remaining galaxies which have a size of 1.9 arc-minutes or more – a total of 2852 additional deep space objects. There are separate catalogs of 928 interesting stars (variable stars, multiple systems, etc.) and 386 other non-stellar objects, including 19 black hole candidates and quasars. An additional user catalog includes 28 user-defined objects that you can program with the coordinates of other interesting or transient objects, such as the comet and asteroid positions you’ll find monthly in Astronomy and Sky & Telescope magazines. A planet catalog is also included, as are 30 alignment stars. The coordinates and other information are shown on a one line x 16 character red LED dot matrix display. The characters are 3/16” high, with four user-selected brightness levels.

The JMI NGC-MAX is available with encoders to fit the following telescopes:

    APM Giro-2 Deluxe; Astro-Physics Super Polaris DX; AstroSystems TeleKit; Bausch & Lomb 4000, 8000; Cave Astrola Standard*, Astrola Deluxe*; Celestron C4-R, C4.5, C5, C5+, C5-S, C6, C6-N, C6-R, C8*, C8+*, C8-N, C8-S, C9¼-S, C10-N, C11, C14, C80-HD, C102, C102-HD, C114-HD, Celestar 8, Celestar 8 Deluxe, CG-4, CG-5, CG-9¼, CG-11, CG-14, CI-700, Classic 8*, CM-1100, CM-1400, CR-150HD, Fastar 8, G-8, G8-N, G-9¼, Great Polaris, Polaris, Powerstar 8*, SP6, Star Hopper 6 / 8, Super C8*, Super Polaris, Ultima 8, Ultima 9¼, Ultima 11; Coulter Odyssey 8 / 10.1 / 13.1 / 16 / 17.5; Criterion Dynamax 8; Dark Star Telescopes Dobsonian; Discovery EQ; ICS Dobsonian; JMI NGT-6, NGT-12.5, NGT-18; Losmandy G-11 (made since 2002), GM-8 (made since 2002); Meade 440, 628, 645, 826, 856, 880, 1060, 1266, 2040, 2045, 2045D, 2080, 2120, DS-10, DS-16, 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, Argonaut 150mm / 6" GP-DX, Deep Space Explorer 6 / 8 / 10 / 12.5 / 16, EQ-3, EQ-4, R200SS GP, ShortTube 80/90, SkyQuest XT 6 / 8 / 10, SkyView Deluxe EQ, SkyView Pro EQ, Skywatcher 120, StarMax 127, VX102(-ED/-FL) GP, VX120 GP; Parks Astrolight, Superior 8 / 10 / 12.5 / 16; Questar 3.5; Starsplitter II 12.5-30, Compact 10 / 12.5 / 14.5, GEM, Tube 8 / 10; Sunrise Telescopes Dobsonian; Synta Sky-Watcher EQ4 (a few were aka EQ5) / EQ6; Takahashi EM-10, EM-200, NJP, Teegul TG-LML (requires special adapters that add $50 to the price shown above); Tectron 15; TeleVue Gibraltar (mounts made after 2002 only require special adapters that add $50 to the price shown above), Panoramic (requires special adapters that add $50 to the price shown above), Renaissance-101, Systems Mount, Tele-Pod (requires special adapters that add $50 to the price shown above); Torus Optical 15; Vixen Great Polaris, Great Polaris Deluxe; Universal Astronomics UniStar Heavy* / Light*; Z-Optical Dobsonian (some sizes not verified).

Custom Installations are available for an additional cost. Some telescopes marked with an asterisk (*) are considered custom installations and are priced accordingly. Universal Astronomics UniStar and Meade LXD500 installations marked with an asterisk (*) are $50 higher than the price shown.

The following notes apply to those Celestron C8 fork-mounted telescopes marked with an asterisk (*) above:

    If your fork-mount Celestron C8 was manufactured after 1985, the optical tube will be black and the right ascension axis center screw hole will have a 10-32 thread. The location of the right ascension axis center screw hole is shown in the accompanying “Images of Some Features” section to the right.

    If your C8 was manufactured between 1980 and 1985: the optical tube will be orange or black and the right ascension axis center screw hole will have a 10-32 thread in most cases, but it will have an 8-32 thread in a few cases.

    If your C8 was manufactured between 1975 and 1980: the optical tube will be orange and the right ascension axis center screw hole will have an 8-32 thread.

    If your C8 was manufactured before 1975: The optical tube will be orange. if there is no hole in the center of the right ascension axis it will need to be drilled. If the center hole is not threaded it will need to be tapped (to JMI specifications). If the hole is threaded we will need to know the thread size. Check the declination thread size also. Some scopes have non-standard 10-24 threads on both axes. We also need to know the inside diameter and depth of the right ascension screw well. When measuring the depth, include any ribs that protrude up from the surface. Placing a straight edge (such as a ruler) across the top of the hole will help in making this measurement. We may need more specific information such as drawings and dimensions.
    Please note that the fork-mounted C8 is not the same as the Ultima 8, Celestar 8, Celestar 8 Deluxe, Fastar 8, or any German equatorially mounted C8 noted above. These all require different hardware.

    The C8 Powerstar PEC, with the central right ascension locking knob, needs some special consideration. This telescope was built for encoders but included a flaw in the design. The clock drive movement is not registered by the encoders. This leaves two options with both having drawbacks that must be considered. The first option is to use the MAX computer's ET (equatorial table) mode since normal right ascension tracking will not be seen by the encoders. The drawback here is that the telescope must be polar aligned for the encoder system to work properly. The second option is to use the EQ or EP mode and turn off the clock drive. With this option, the scope does not need to be polar aligned. The obvious drawback to this is that the telescope will not be able to track in right ascension.

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JMI - NGC-MAX 12,046 Object aiming computer complete installation (specify telescope)

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JMI - NGC-MAX 12,046 Object aiming computer complete installation (specify telescope)An image showing the location of the right ascension axis center screw hole for installing encoders in a vintage Celestron (as discussed in the copy).
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Our Product #: NGC
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The JMI NGC-MAX aiming computer is a very accurate set of digital setting circles with a database of 12,046 unique deep space objects and stars that it can guide you to and/or identify. An RS-232 port in the control box/display allows....





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