BRESSER Messier 4" f/5.9 Achro Refractor Telescope - OTA Only

BRESSER Messier 4" f/5.9 Achro Refractor Telescope - OTA Only

BRESSER Messier 4" f/5.9 Achro Refractor Telescope - OTA Only

B&H # BRAR102600 MFR # BR-AR102600
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
  • Cradle Ring Mount with Handle
  • Vixen-Style Dovetail Mounting Plate
  • 1/4"-20 Piggyback Camera Mount
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BRESSER AR-102S overview

  • 1Description

Bresser offers their Messier 4" f/5.9 Achro Refractor Telescope here without a mount or tripod for users who have a platform and want to add this to their options of OTAs. 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.

While there is no mount included, a mounting cradle-ring assembly is provided. It 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. A stainless steel Vixen-style dovetail plate makes it compatible with any alt-az or equatorial mount with a Vixen-style saddle, 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
Mounting
  • Requires user-supplied mount and tripod
  • Vixen-style dovetail mounting plate
  • Integrated 1/4"-20 piggyback camera mounting screw
  • Mounting ring cradle enables OTA orientation adjustment relative to mount
  • Carrying handle for safe set-up and break-down
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
In the Box
BRESSER Messier 4" f/5.9 Achro Refractor Telescope - OTA Only
  • 6x30 Finderscope
  • 26mm Eyepiece
  • 1.25" Star Diagonal
  • 2" to 1.25" Focuser Adapter
  • Mounting Rings with Dovetail Plate
  • 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 None
    Mount Type None
    Power Source None
    Optical Tube Dimensions 24.2 x 4.1" / 61.5 x 10.4 cm
    Weight 8.9 lb / 3.9 kg
    Packaging Infowtfeecdtxbxabuxfzxbqysfr
    Package Weight 14.85 lb
    Box Dimensions (LxWxH) 40.25 x 10.25 x 9.8"

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