The MesOptimized for both visual exploration and astrophotography, the Messier AR-102 Optical Tube from Bresser is an echelon achromat refractor offering pervasive features and high-quality optics. Housed inside the tube is a vibrant, exquisitely corrected achromatic lens that showcases planets and the moon in stunning detail. The 102mm diameter and 600mm focal length facilitate intense clarity when observing celestial objects within our system.

The telescope’s potential skyward exploration is only broadened when employed under darker skies. With this Optical tube, the observation of hundreds of nebulae from the NGC and Messier catalogs is possible, a trait rarely found in this price bracket. Bresser has minimised distractions and enhanced light transmission by applying multi-layer anti-reflective coatings to the optical surfaces.

One key feature is the new 2.5″ Hexfoc eyepiece holder. The innovative hexagonal design ensures exceptional resistance and improved performance over other models, even when dense accessories are used. This feature aids in maintaining axial alignment and combating deflection. Moreover, the eyepiece holder’s generous diameter diminishes vignetting, providing uninterrupted viewing.

Connecting the optical tube to various mounts is simple, thanks to the standard dovetail switch. The tube is compatible with mounts of stiffness category EQ-3-2/EXOS-1 and above.

Key Features:

Optical System:

– Exceptional efficiency and durability of optics
– The sturdy construction of the tube and its timeless aesthetics

Optical System Mounting:

– Metal fixing rings secure the tube
– Dovetail with a stainless steel rail for enhanced stability and longevity
– User-friendly handles for comfortable transportation
– Specialty adapter to attach a camera (Piggyback photo adapter)

Eyepiece Holder:

– 2.5″/2″ pull-out design with a hexagonal sleeve clamping ring
– Reduction of 2″ to 1.25″ with a clamping ring and M42x0.75 (T2) thread
– Precise focusing via millimeter scale
– Focus knob designed for high precision

Included Equipment:

– 26mm/1.25″ SPL eyepiece
– A 6x30mm finder equipped with a crosshair
– A diagonal mirror, 90° 1.25″
– Two extensions for the eyepiece holder (38mm and 25mm)

Technical Specifications:

– Optical System: 2-element achromat refractor
– Lens Diameter: 102mm
– Focal Length: 600mm
– Focal Ratio: f/5.9
– Resolution: 1.16 arc seconds
– Theoretical Limiting Magnitude: 12.0mag
– Maximum Useful Magnification: 200x
– Tube Length (with rings inserted): 70cm
– Tube Length (after removing the dew shield): 58cm
– Dovetail Clamp Weight: 1.055kg
– Tube Weight (with dew shield and 2″/1.25″ adapter): 2.9kg
– Total Kit Weight: 5kg

Warranty:

The Messier AR-102 optical tube is backed by a reassuring 2-year warranty, supporting you in your astronomical adventures.

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