Bresser AC 102S/600 Messier Hexafoc EXOS-2
Matched with a high-load equatorial platform, the Bresser AC 102S/600 Messier Hexafoc EXOS-2 supplies a 102mm refractor, integrated polar scope, and manual movement.
- EXOS-2 mount includes integrated polar scope
- 600mm focal length uses f/5.9 optics
- 102mm aperture delivers 1.14-arcsecond resolution
- Upgrade-ready for dual-axis motorization or GoTo
- 26mm eyepiece provides listed 23x magnification
- Heavy-duty tripod and counterweight included
In Stock
Description
Ready for a future motorized kit, the Bresser AC 102S/600 Messier Hexafoc EXOS-2 is the high-load option for this 102mm tube, rigid enough that Bresser markets it as upgrade-ready — buy it manual today, motorize it later without replacing the mount, a genuine consideration for anyone unsure yet how far they’ll take this hobby.
An integrated polar scope built into the mount head makes polar alignment faster than sighting by eye, the way the EXOS-1 and AT-3 versions of this tube require. That extra rigidity and alignment convenience is the whole case for stepping up from the EXOS-1, and the heavy-duty stainless tripod means longer sessions at higher magnification stay steady instead of drifting between each careful adjustment of the slow-motion controls, a difference that compounds over a multi-hour session under a dark sky.
Key Features of Bresser AC 102S/600 Messier Hexafoc EXOS-2
An integrated polar scope and high-load German equatorial design set this mount apart from the standard EXOS-1 build sharing this optical tube, giving it real headroom for accessories added over time.
- Integrated polar scope speeds up accurate alignment before a session
- High-load equatorial design stays vibration-free even at 200x magnification
- 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 wider-field eyepieces for richer star field views
- Upgrade path avoids the cost of replacing an entire mount down the road
How the EXOS-2 Compares
Against the EXOS-1 sharing this same optical tube, the EXOS-2’s integrated polar scope and high-load rating make alignment faster and the mount steadier at high magnification. The real long-term case is the upgrade path: this mount accepts a motorized module later, so the manual EXOS-2 doesn’t close the door on GoTo tracking down the road, unlike a fixed-mode mount elsewhere in this catalog.
Applications & Use Cases
Built for highly stable manual tracking of wide-field deep-sky objects and planetary targets, this telescope provides a rigid, vibration-free foundation ready for a future electronic upgrade whenever that becomes a priority.
- Observers who want a mount they can motorize later without replacing it
- Anyone running extended high-magnification sessions where rigidity matters most
- Buyers deferring the manual-versus-GoTo decision until they know their preference
Bresser Warranty & Support
The AR-102S/600 EXOS-2 carries a 2-Year Factory Warranty covering manufacturing defects, handled directly through Bresser’s support channel.
Bresser AC 102S/600 Messier Hexafoc EXOS-2 Specs
| Brand | Bresser |
| Full Model Code | Bresser Messier AR-102S/600 EXOS-2 |
| Country of Origin | Germany |
| Optical Design | Achromatic Refractor (Short Tube Configuration) |
| Aperture | 102 mm (4.01 inches) |
| Focal Length | 600 mm |
| Focal Ratio | f/5.9 |
| Optical Coatings | Multi-Coated Optics |
| Secondary Mirror Obstruction | 0 mm (0%) |
| Secondary Mirror Obstruction by Area | 0% |
| Backfocus Distance | 115 mm |
| Rear Cell Thread Type | M42x0.75 Male T-thread via integrated adapter |
| Image Circle Diameter | 34 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 600 mm |
| Optical Tube Weight | 3.9 kg (8.60 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 (23x), 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 of wide field deep-sky objects and planetary configurations, providing an rigid, vibration-free foundation prepared for electronic upgrade modules. |




















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