Description
Observe detailed lunar craters and bright planets with the Omegon AC 102/660 AZ-3 Telescope achromatic refractor system. Designed in Germany, this f/6.5 astronomical telescope combines a 102mm (4.01 inches) aperture with a 660mm focal length. The Omegon AC 102/660 provides a 1.14 arcsecond Dawes resolving power and reaches down to a limiting visual magnitude of 11.8 for night sky exploration.
The Omegon AC 102/660 AZ-3 Telescope features a two-element air-spaced crown and flint glass objective treated with multi-coated anti-reflective coatings on all air-to-glass surfaces. Its rigid aluminum optical tube assembly contains internal matte-black anti-reflection baffles to maximize visual contrast. Paired with a heavy-duty AZ-3 altazimuth mount chassis and aluminum tripod, the entire system weighs 6.70 kg (14.77 lbs), while the standalone optical tube weighs 2.80 kg.
Key Features of Omegon AC 102/660 AZ-3 Telescope
Engineered for intuitive manual sky scanning, this Omegon AC 102/660 refractor telescope combines clear 102mm optics with a geared altazimuth mount. Dual flexible slow-motion cables and an unobstructed optical design deliver bright views across rich star clusters and solar system targets.
- 102mm (4.01 inches) aperture paired with 660mm focal length at f/6.5 speed
- Two-element air-spaced achromatic doublet using crown and flint glass
- Multi-coated anti-reflective treatment applied to all air-to-glass surfaces
- 0% secondary obstruction for high-contrast unobstructed light transmission
- 2-inch rack and pinion focuser with step-down 1.25-inch adapter collar
- AZ-3 precision altazimuth mount head with aluminum tripod and accessory tray
- Dual flexible slow-motion tracking control cables for smooth manual positioning
- Pre-calibrated red dot pointer finder attached directly to focuser shoe
Achromatic Doublet Optics & 2-Inch Focuser
The 102mm objective lens utilizes precision optical glass to control chromatic aberration while maintaining a wide field profile. Equipped with a 2-inch rack and pinion drive focuser and 1.25-inch reducer, this Omegon refractor supports magnifications from 15x up to 200x.
AZ-3 Altazimuth Mount & Flexible Slow-Motion Controls
Manual celestial tracking requires responsive control without vibration. The Omegon AC 102/660 AZ-3 incorporates an AZ-3 mount head with flexible slow-motion control cables, letting observers make micro-adjustments in altitude and azimuth smoothly. Supported by sturdy aluminum tripod legs and an accessory tray, it provides a stable viewing platform for long observing sessions.
- Precision AZ-3 altazimuth mount chassis with flexible slow-motion control cables
- Complete eyepiece package including Super 25mm and Super 10mm oculars
- 1.25-inch 90-degree star diagonal mirror for comfortable high-angle viewing
Omegon AC 102/660 Warranty
The Omegon AC 102/660 AZ-3 Telescope is backed by a 2-year limited warranty against manufacturing defects. The factory kit includes the 102mm refractor OTA, AZ-3 mount head, aluminum tripod with tray, flexible tracking cables, red dot finder, 90-degree star diagonal, Super 25mm eyepiece, and Super 10mm eyepiece.
Omegon AC 102/660 AZ-3 Telescope Specs
| Brand | Omegon |
| Full Model Code | Omegon AC 102/660 Achromatic Refractor on AZ-3 Altazimuth Precision Mount System |
| Country of Origin | Germany (Designed) / China (Manufactured) |
| Optical Design | Achromatic Refractor (Two-Element Air-Spaced Crown and Flint Glass Objective Layout) |
| Aperture | 102 mm (4.01 inches) |
| Focal Length | 660 mm |
| Focal Ratio | f/6.5 |
| Optical Coatings | Multi-Coated Anti-Reflective Optical Layer Treatment on All Air-to-Glass Surfaces |
| Glass Material | Standard Crown and Flint Optical Glass Elements |
| Secondary Mirror Obstruction | 0 mm (Refractor System / Free Aperture Profile) |
| Secondary Mirror Obstruction by Diameter | 0.0% |
| Secondary Mirror Obstruction by Area | 0.00% |
| Resolving Power | 1.14 Arcseconds (Dawes), 1.35 Arcseconds (Rayleigh) |
| Limiting Visual Magnitude | 11.8 |
| Highest Useful Magnification | 200x |
| Lowest Useful Magnification | 15x |
| Optical Tube Material | Fully Enclosed Rigid Aluminum Tube Construction with Internal Matte-Black Anti-Reflection Baffles |
| Focuser Style & Mechanism | 2-inch Rack and Pinion Drive Focuser Assembly with Step-Down 1.25-inch Adapter Collar |
| Mirror Lock Mechanism | No (Refractor Mechanical Focuser Layout Inapplicable) |
| Optical Tube Dimensions | 120 mm x 640 mm |
| Optical Tube Weight | 2.80 kg (6.17 lbs) - OTA Only / 6.70 kg (14.77 lbs) - Combined Total Assembly Weight |
| Mount Attachment Type | Integrated Tube Rings Fixed Directly onto AZ-3 Structural Top Plate Chassis |
| Finder Scope Specification | Red Dot Finder Assembly Pre-calibrated and Clamped onto Focuser Housing Shoe |
| Included Accessories | 102mm Achromatic Refractor OTA, AZ-3 Altazimuth Mount Head, Aluminum Tripod Legs with Accessory Tray, Slow-Motion Flexible Control Cables, Red Dot Pointer Finder, 1.25-inch 90-Degree Star Diagonal Mirror, Super 25mm Eyepiece, Super 10mm Eyepiece |
| Standard Warranty | 2-Year Limited Warranty |
| Application | Mid-aperture manual altazimuth astronomical scanning tracking bright solar system details and lunar craters, exploiting an adjustable flexible tracking control cable system to simplify macro frame updates. |


























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