Meade Specifications ETX-90PE Astro Telescope, Specifications ETX-105PE Astro Telescope

SPECIFICATIONS

Specifications: ETX-90PE Astro Telescope

Optical design . . . . . . . . . . . . . . . . . . . . Maksutov-Cassegrain Primary mirror diameter . . . . . . . . . . . . . . . . . . . 96mm (3.78”) Clear aperture. . . . . . . . . . . . . . . . . . . . . . . . . . . . 90mm (3.5”) Focal length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1250mm Focal ratio (photographic speed). . . . . . . . . . . . . . . . . . . f/13.8 Near focus (approx) . . . . . . . . . . . . . . . . . . . . . . 11.5 ft (3.5m) Resolving power . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 arc secs Super multi-coatings (EMC) . . . . . . . . . . . . . . . . . . . . standard Limiting visual stellar magnitude (approx.) . . . . . . . . . . . . 11.7 Image scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.16°/inch Maximum practical visual power . . . . . . . . . . . . . . . . . . . 325X Optical tube dimensions

(dia. x length) . . . . . . . . . . . 10.4cm x 27.9cm (4.1” x 11”) Secondary mirror obstruction (dia.; %) . . 27.9mm (1.1”); 9.6% Telescope mounting . . . . . . . . . . . . . . . . fork type; double tine Setting circle diameters. . . . . . . . . . . . . . . . Dec.: 3.5”; R.A.: 7” SmartFinder. . . . . . . . . . . Red dot projected onto finder’s lens LNT Module . . . . . . High accuracy, temperature-compensated

. . . . . . . . . . . . . . . . . oscillator, updatable using Meade’s

. . . . . . . . . . . . . . . . . . . . . . . . optional ATUM accessory Input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 volts DC Motor Drive System DC servo motors with encoders, both axes Bearings:

Altitude . . . . . . . . . . . . . . . . . . . . . . . UHMW polyethylene Azimuth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PTFE

Materials:

Tube body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . aluminum Mounting . . . . . . high-impact ABS, aluminum-reinforced Primary mirror. . . . . . . . . . . . . . . . . . . . . . . . Pyrex® glass Correcting lens . . . . . . . . . . . BK7 optical glass, Grade-A

Telescope dimensions:

. . . . . . . . . . . . . . . . 38cm x 18cm x 22cm (15” x 7” x 9”) Telescope net weight:

(incl. AutoStar & batteries) . . . . . . . . . . . . 3.5kg (7.8 lbs) Telescope shipping weight. . . . . . . . . . . . . . . . 5.8kg (12.8 lbs) Battery Life (approx.):

with AutoStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 hrs

Specifications: ETX-105PE Astro Telescope

Optical design . . . . . . . . . . . . . . . . . . . . Maksutov-Cassegrain Primary mirror diameter . . . . . . . . . . . . . . . . . . 116mm (4.56”) Clear aperture. . . . . . . . . . . . . . . . . . . . . . . . . . 105mm (4.13”) Focal length . . . . . . . . . . . . . . . . . . . . . . . . . . 1470mm (57.8”) Focal ratio (photographic speed) . . . . . . . . . . . . . . . . . . . . f/14 Near focus (approx) . . . . . . . . . . . . . . . . . . . . . . . . 4.6m (15 ft) Resolving power . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 arc secs Super multi-coatings (EMC) . . . . . . . . . . . . . . . . . . . . standard Limiting visual stellar magnitude (approx.) . . . . . . . . . . . . 12.1 Image scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.99°/inch Maximum practical visual power. . . . . . . . . . . . . . . . . . . . 420x Optical tube dimensions

(dia. x length) . . . . . . . . 12.4cm x 32.8cm (4.88” x 12.9”) Secondary mirror obstruction (dia.; %) . . . 3.3cm (1.32”); 9.4% Telescope mounting . . . . . . . . . . . . . . . . fork type; double tine Setting circle diameters . . . . . . . . . . . . . Dec.: 3.81”; R.A.: 7.8”

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