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Omegon
Omegon AC 102/660 AZ-3
A 102mm achromatic refractor on a simple alt-az mount — the classic beginner telescope configuration that has introduced more people to astronomy than any other format. The AZ-3 mount is light, stable for visual use, and has slow-motion controls on both axes, which makes tracking an object at higher magnifications practical. At f/6.5, this scope gives sharp lunar views and reasonable planetary performance; chromatic aberration is present (a blue fringe on bright objects) but manageable below about 150×. What it does well — daytime terrestrial use, Moon, planets, and bright nebulae — it does genuinely well for the price. A sensible first step that won't embarrass you once you know more.
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What you'll see
This thread does not contain direct user reports of actual observing sessions through an Omegon AC 102/660 AZ-3 telescope. The discussion focuses on purchase decisions and comparisons between various beginner scopes (Star Sense DX130, Celestron refractors, Dobsonians, etc.). While a Celestron 102DX refractor is mentioned briefly in context of being 'under-mounted' and better paired with another scope, there are no specific accounts of what objects look like, how they perform under different conditions, or detailed observing notes from owners of this particular model. To provide accurate information about what this telescope reveals in actual use, user reports specifically documenting views through an Omegon AC 102/660 would be needed.
Worth knowing before you buy
Mount is wobbly and unstable, with balance issues even when using quality third-party eyepieces instead of included acce…
Tension adjustment mechanism is extremely difficult to operate - requires excessive force to tighten and nearly impossib…
Mount vibrates excessively, making viewing frustrating and causing objects to shake during observation
Head to head
How it compares
AC 102/660 AZ-3
Omegon
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AC 102/660 AZ-3
Omegon
AR102
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AC 102/660 AZ-3
Omegon
StarSense Explorer LT 80AZ
Celestron
102mm · Manual Refractor vs 80mm · Manual Refractor
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Full Specifications
Optics
| Aperture | 102mm |
| Focal Length | 660mm |
| Focal Ratio | f/6.5 |
| Optical Design | Refractor |
| Coatings | Fully multi-coated achromatic doublet |
Mount & Tracking
| Mount Type | Alt-Az |
| GoTo (Computerised) | No |
| Tracking | No |
Focuser
| Focuser Size | 1.25" |
| Focuser Type | Rack and pinion |
Physical
| OTA Weight | 2.5kg |
| Total Weight (with mount) | 5.2kg |
| Tube Length | 700mm |
| Tube Material | Aluminium |
Included Accessories
| Eyepieces | 10mm and 25mm eyepieces |
| Finder Scope | 6x30 finder scope |
| Diagonal | Yes |