BRESSER Messier 4" f/5.9 Achro Refractor Telescope with Exos-2 EQ Mount and Tripod

BRESSER Messier 4" f/5.9 Achro Refractor Telescope with Exos-2 EQ Mount and Tripod

BRESSER Messier 4" f/5.9 Achro Refractor Telescope with Exos-2 EQ Mount and Tripod

B&H # BRAR102EXOS2 MFR # BR-AR102EXOS2
No Longer Available

Product Highlights

  • 4" Aperture Achromatic Refractor
  • 600mm Focal Length, f/5.9 Focal Ratio
  • 2" Rack-and-Pinion Focuser
  • 26mm Eyepiece with 1.25" Adapter
  • 90° Star Diagonal & 6x30 Finderscope
  • Exos-2 Manual Equatorial Mount
  • Dual-Axis Slow Motion Cables
  • Adjustable Tripod, 2" Diameter Legs
  • Illuminated Polar Finder Scope
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BRESSER AR-102S overview

  • 1Description

Bresser provides beginner and intermediate astronomers with a complete manual observation kit with this version of their Messier 4" f/5.9 Achro Refractor Telescope. It comes with the apochromatic refractor optical tube, the Exos-2 equatorial mount, an heavy-duty tripod, a polar finder scope, and an array of optical accessories. This Messier optical tube assembly (OTA) features an achromatic lens system to virtually eliminate chromatic and spherical aberrations which translates to an immersive distortion-free viewing experience with true color rendition across the entire field of view - especially at the edges. The combination of aperture, aberration-free optics and a fast f/5.9 focal ratio make this telescope ideally suited for astrophotography and astroimaging. This OTA is ideally suited for imaging or viewing near and deep-sky objects such as the Moon, planets, galaxies, and nebulae.

This iteration of the Messier is equipped with the Exos-2 equatorial mount and features dual-axis slow motion cables to more easily track objects, and an integrated bubble level to assist in set-up. To make set-up and alignment faster and easier, Bresser includes an illuminated polar finder scope for use in the Northern hemisphere. The tripod is built with large 2" diameter stainless steel legs and tight tolerances to reduce vibration for clearer viewing. A center stabilizer bar pulls the accessory tray up to lock the legs in place adding further rigidity and vibration reduction. It is adjustable from 29 to 49" to accommodate a wide range of users and features large thumbscrews for tool-free adjustment in the field. The mounting cradle-ring assembly clamps over the optical tube and lets the user adjust the orientation and position of the scope relative to the mount to optimize viewing comfort and balancing, while avoiding interference with other equipment, and a 1/4"-20 stud on the top of the cradle ring assembly enables a camera to be piggybacked onto the scope for wide-field photography.

The scope is equipped with a 2" rack-and-pinion focuser for over-sized eyepieces and accessories, and comes with a 1.25" reducer adapter and a 1.25" 26mm super Plossl eyepiece that yields 23x power on the OTA. The adapter also has integrated T2 mounting threads to enable the use of a user-supplied DSLR-specific T2 ring for astrophotography through the scope.

Optical Performance
  • Aperture: 102mm
  • Focal ratio: f/5.9
  • Focal length: 600mm
  • Refractor-style optical design
  • Achromatic lenses eliminate chromatic and spherical aberrations for true color rendition and without distortion across the entire field of view, especially at the edges
  • 6x30 non-illuminated straight-view finderscope
Mount
  • Cast aluminum with white powder-coat
  • Flexible dual-axis slow motion cables reduce vibrations while tracking objects
  • Integrated bubble level on mount base
  • 9.9lb (4.5kg) counterweight with 20mm diameter bar
  • Latitude, Right Ascension, and Declination scales
  • Right ascension axis release lever allows for fast adjustment
  • Illuminated polar finder scope to increase alignment precision
Optical Accessories
  • 2" rack-and pinion focuser
  • 26mm super Plossl eyepiece, yields 23x power
  • 2"-to-1.25" eyepiece adapter with integrated T2 threads
  • 90° star diagonal
Tripod
  • Three-section adjustable-height
  • 29lb payload capacity
  • 2.0" stainless steel legs
  • 29 to 49" height range
  • Center stabilizer bar locks legs in place to reduce vibrations
  • Accessory tray with holes for 1.25" eyepieces
  • Spiked feet for use in ground and grass for increased stability, especially on rough or uneven area
In the Box
BRESSER Messier 4" f/5.9 Achro Refractor Telescope with Exos-2 EQ Mount and Tripod
  • 6x30 Finderscope
  • 26mm Eyepiece
  • 1.25" Star Diagonal
  • 2" to 1.25" Focuser Adapter
  • Mounting Rings with Dovetail Plate
  • Exos-2 German Equatorial Mount with Tripod bezfsssysfcrxtzdutfftxzy
  • Limited Five-Year Warranty
  • Table of Contents
    • 1Description

    BRESSER AR-102S specs

    Optical Design Achromatic refractor
    Aperture 4" / 10.2 cm
    Focal Length 600mm
    Focal Ratio f/5.9
    Eyepiece Barrel Diameter 2", or 1.25" with adapter
    Diagonal 90° star
    Finderscope 6 x 30, straight-view
    GO-TO Capability None
    Tripod Stainless steel adjustable height
    2" / 5.1 cm diameter legs
    Mount Type Manual German equatorial
    Power Source None
    Optical Tube Dimensions 24.2 x 4.1" / 61.5 x 10.4 cm
    Weight 8.9 lb / 3.9 kg

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