Omegon MC 90/1250 MightyMak OTA
Supplied as a standalone optical tube, the Omegon MC 90/1250 MightyMak OTA provides a 90mm Maksutov-Cassegrain system with 1250mm focal length and Vixen-style mounting hardware.
- 90mm aperture provides 1.29-arcsecond resolution
- 1250mm focal length uses f/13.9 optics
- Internal mirror focuser provides optical adjustment
- Vixen dovetail and protective cap included
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Description
Urban observers with limited balcony space turn to the Omegon MC 90/1250 MightyMak OTA compact Maksutov-Cassegrain optical tube assembly for high-magnification planetary tracking. Designed in Germany, this f/13.9 catadioptric telescope features a 90mm (3.54 inches) aperture and a folded 1250mm focal length, attaining 1.29 arcsecond Dawes resolving power and reaching magnitude 11.5.
The Omegon MC 90/1250 MightyMak OTA combines a spherical BK7 primary mirror with a multi-coated crown meniscus corrector lens and aluminized secondary spot. Its fully enclosed aluminum cylinder shell features composite threaded end adapters and an internal tension spring buffer to restrain mirror shift. Weighing just 1.20 kg (2.65 lbs) with 100mm by 250mm dimensions, this portable Maksutov OTA mounts directly onto standard astronomy tripods and camera mounts.
Key Features of Omegon MC 90/1250 MightyMak OTA
Crafted for ultra-compact planetary and lunar observation, this Omegon MightyMak 90 optical tube assembly packs a long 1250mm focal length into a tiny footprint. Its internal primary mirror focusing mechanism and multi-coated meniscus lens deliver sharp, high-contrast views from restricted viewing spaces.
- 90mm (3.54 inches) aperture with long 1250mm focal length and f/13.9 focal ratio
- Maksutov-Cassegrain optical design with spherical primary and crown meniscus lens
- Multi-coated anti-reflective treatment on meniscus corrector lens surface
- 29mm secondary mirror spot obstruction (32.22% diameter, 10.38% area)
- Internal primary mirror micro-movement focusing via rear precision rotary dial
- Fully enclosed aluminum cylinder shell with composite threaded end adapters
- Vixen-style dovetail foot configuration with pre-drilled 1/4-inch photo thread ports
- Pre-fitted mini dovetail base shoe for reflex finder brackets
Folded Maksutov-Cassegrain Optical Prescription
The folded Maksutov optical train eliminates chromatic aberration while maintaining high image contrast. With internal tension spring stabilization, this portable Omegon MightyMak OTA delivers sharp visual performance across magnifications from 13x up to 180x.
Internal Primary Focus & Vixen Dovetail Foot
Versatile mounting and smooth focusing make this compact OTA ideal for travel. The Omegon MC 90/1250 MightyMak features an internal mirror-focusing dial that keeps optical mechanics completely sealed from dust and weather. Its built-in Vixen foot includes 1/4-inch photo threads, enabling instant attachment to astronomy mounts or standard photographic tripods.
- Internal primary mirror micro-movement focus system with rear rotary dial
- Vixen-style dovetail mounting foot equipped with 1/4-inch photo tripod threads
- Weather-shielded aluminum tube construction weighing only 1.20 kg
Omegon MC 90/1250 MightyMak OTA Warranty
Designed under German engineering standards, the Omegon MC 90/1250 MightyMak OTA comes backed by a 2-year limited warranty against material and manufacturing defects. The factory package contains the 90mm Maksutov-Cassegrain optical tube assembly, pre-mounted Vixen-style dovetail mounting bracket base, and a front protective objective dust cap.
Omegon MC 90/1250 MightyMak OTA Specs
| Brand | Omegon |
| Full Model Code | Omegon MightyMak 90/1250 Maksutov-Cassegrain Optical Tube Assembly |
| Country of Origin | Germany (Designed) / China (Manufactured) |
| Optical Design | Maksutov-Cassegrain (Spherical Primary Mirror paired with Meniscus Corrector Lens and Aluminized Secondary Spot) |
| Aperture | 90 mm (3.54 inches) |
| Focal Length | 1250 mm |
| Focal Ratio | f/13.9 |
| Optical Coatings | Multi-Coated Anti-Reflective Optical Treatments on Meniscus Corrector Lens Surface |
| Glass Material | Standard BK7 Optical Glass Substrates and Crown Meniscus Corrector Element |
| Secondary Mirror Obstruction | 29 mm |
| Secondary Mirror Obstruction by Diameter | 32.22% |
| Secondary Mirror Obstruction by Area | 10.38% |
| Resolving Power | 1.29 Arcseconds (Dawes), 1.53 Arcseconds (Rayleigh) |
| Limiting Visual Magnitude | 11.5 |
| Highest Useful Magnification | 180x |
| Lowest Useful Magnification | 13x |
| Optical Tube Material | Fully Enclosed Aluminum Cylinder Shell with Composite Threaded End Adapters |
| Focuser Style & Mechanism | Internal Primary Mirror Micro-Movement Focus System using Rear Precision Rotary Dial |
| Mirror Lock Mechanism | No (Internal Tension Spring Buffer Restrains Primary Mirror Shift) |
| Optical Tube Dimensions | 100 mm x 250 mm |
| Optical Tube Weight | 1.20 kg (2.65 lbs) |
| Mount Attachment Type | Standard Vixen-Style Dovetail Foot Configuration with Pre-drilled 1/4-inch Photo Thread Ports |
| Finder Scope Specification | Not Included / Pre-fitted with Mini Dovetail Base Shoe for Reflex Finders |
| Included Accessories | 90mm Maksutov-Cassegrain OTA, Vixen-Style Dovetail Mounting Bracket Base, Front Protective Cap Dust Mask |
| Standard Warranty | 2-Year Limited Warranty |
| Application | Ultra-compact planetary and lunar visual tracking loops from restricted balcony spaces, exploiting a folding 1250mm focal structure to achieve high magnifications within a tiny physical footprint. |






























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