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Bresser AC 102/1350 Messier Hexafoc EXOS-2
For long-tube manual observing, the Bresser AC 102/1350 Messier Hexafoc EXOS-2 combines a 1350mm achromatic refractor with a high-load EXOS-2 equatorial platform.
- 102mm aperture records 1.14-arcsecond resolution
- f/13.2 optics use a 1350mm focal length
- EXOS-2 mount includes integrated polar scope
- 2.5-inch Hexafoc focuser supports visual setup
- Motorization and GoTo upgrades remain supported
- 26mm eyepiece and tripod are included
In Stock
Description
Eliminating the settling delay manual adjustments create, the Bresser AC 102/1350 Messier Hexafoc EXOS-2 answers this long tube’s vibration sensitivity with a high-load platform built specifically to stay steady between each fine correction at this ultra-long focal ratio.
An integrated polar scope speeds up alignment beyond eye-sighting, and the high-load rating means this mount holds steady across the full 1350mm optical path — real advantages when you’re trying to split a close double star or resolve fine lunar detail. The heavy-duty stainless tripod under this build settles noticeably faster than the standard EXOS-1 setup, a difference double-star observers notice immediately.
Key Features of Bresser AC 102/1350 Messier Hexafoc EXOS-2
An integrated polar scope and high-load equatorial design target the exact vibration sensitivity this ultra-long focal length creates, solving a limitation the EXOS-1 handles less completely.
- Integrated polar scope speeds up accurate alignment before a session
- High-load equatorial design eliminates vibration across this tube’s long optical path
- Upgrade-ready for a future dual-axis motorized or GoTo kit without replacing the mount
- Heavy-duty stainless steel tripod adds rigidity beyond the EXOS-1’s standard build
- Included counterweight balances the tube precisely once mounted
- 2-inch zenith mirror accepts wide-field eyepieces for richer views
- Reduced settling time benefits precise double-star and fine lunar work directly
How the EXOS-2 Compares
Against the EXOS-1 sharing this same tube, the EXOS-2’s high-load rating and integrated polar scope directly address this ratio’s vibration sensitivity — a genuine advantage for close double-star work where every bit of settling time counts toward a usable view.
Applications & Use Cases
Built as a highly stable manual tracking platform, this telescope suits specialized high-contrast observation of planetary surfaces, lunar geology, and double stars for an observer chasing fine detail.
- Observers doing serious double-star and fine planetary work
- Anyone considering a future motorized upgrade for this focal ratio
- Buyers who found the EXOS-1’s stability limiting at this focal length
Bresser Warranty & Support
The AC 102/1350 EXOS-2 carries a 2-Year Factory Warranty covering manufacturing defects, handled directly through Bresser’s support channel.
Bresser AC 102/1350 Messier Hexafoc EXOS-2 Specs
| Brand | Bresser |
| Full Model Code | Bresser Messier AC 102/1350 EXOS-2 |
| Country of Origin | Germany |
| Optical Design | Achromatic Refractor (Long Focal Ratio Configuration) |
| Aperture | 102 mm (4.01 inches) |
| Focal Length | 1350 mm |
| Focal Ratio | f/13.2 |
| Optical Coatings | Multi-Coated Optics |
| Secondary Mirror Obstruction | 0 mm (0%) |
| Secondary Mirror Obstruction by Area | 0% |
| Backfocus Distance | 130 mm |
| Rear Cell Thread Type | M42x0.75 Male T-thread via integrated adapter |
| Image Circle Diameter | 30 mm |
| Resolving Power | 1.14 Arcseconds |
| Limiting Visual Magnitude | 11.8 |
| Highest Useful Magnification | 200x |
| Lowest Useful Magnification | 15x |
| Optical Tube Material | Aluminum |
| Focuser Style & Mechanism | 2.5-inch Hexafoc Heavy-Duty Rack and Pinion Focuser |
| Mirror Lock Mechanism | No (Refractor Tube Configuration) |
| Optical Tube Dimensions | 103 mm x 1330 mm |
| Optical Tube Weight | 5.9 kg (13.0 lbs) - Tube Only |
| Mount Attachment Type | EXOS-2 High-Load German Equatorial Mount with Integrated Polar Scope |
| Finder Scope Specification | 6x30 Optical Finder Scope |
| Included Accessories | 26mm Super Plossl Eyepiece (52x), 2-inch Zenith Mirror (90-degree), 1.25-inch Adapter, EXOS-2 Equatorial Mount, Heavy-Duty Stainless Steel Field Tripod, 1x 4.5kg Counterweight |
| Power Requirements | None (Upgrade-ready for dual-axis motorization or GoTo kits) |
| Standard Warranty | 2-Year Factory Warranty |
| Application | Highly stable manual tracking and specialized high-contrast observation of planetary surfaces, lunar geology, and double stars, leveraging a heavy-duty platform to eliminate vibration on the long optical tube. |
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