Omegon N 102/640 Dobsonian Telescope

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OMEGON-102640

For compact backyard observation, the Omegon N 102/640 Dobsonian Telescope combines a 102mm spherical Newtonian reflector with 640mm focal length and a wooden tabletop rocker base.

  • 102mm aperture provides 1.14-arcsecond resolution
  • 640mm focal length uses f/6.3 optics
  • Tabletop rocker supports manual movement
  • 25mm and 10mm eyepieces included
$142.00

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SKU: OMEGON-102640 Category: Brand:
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Description

Observe deep-sky star fields and open clusters from your backyard with the Omegon N 102/640 Dobsonian Telescope compact tabletop Newtonian reflector system. Designed in Germany, this f/6.3 telescope features a 102mm (4.02 inches) aperture and a 640mm focal length. The Omegon N 102/640 delivers 1.14 arcsecond Dawes resolving power and reaches magnitude 11.8 for astronomy enthusiasts.

The Omegon N 102/640 Dobsonian Telescope utilizes a spherical BK7 optical glass primary mirror with a standard aluminum coating and protective monoxide layer. Its roll-formed heavy-gauge steel cylinder shell features synthetic protective end rings and rear secondary collimation screws. Mounted onto a wooden tabletop rocker swivel base, the entire assembly weighs 4.90 kg (10.80 lbs), while the 130mm by 600mm optical tube weighs just 2.10 kg.

Key Features of Omegon N 102/640 Dobsonian Telescope

Engineered for easy-to-use backyard stargazing, this Omegon N 102/640 Dobsonian telescope combines an f/6.3 Newtonian optical layout with a tabletop rocker base. Its smooth altitude pivot and dual Kellner eyepieces provide high-contrast views across lunar craters and bright deep-sky targets.

  • 102mm (4.02 inches) aperture paired with 640mm focal length at versatile f/6.3 speed
  • Spherical primary mirror substrate crafted from standard BK7 optical glass
  • Standard aluminum optical coatings with protective monoxide overlay layer
  • 32mm planar secondary mirror obstruction (31.37% diameter, 9.84% area)
  • 1.25-inch standard rack and pinion focuser with manual tension adjustment screw
  • Side altitude pivot axis mounted into a wooden tabletop rocker swivel base
  • Pre-calibrated red dot pointer finder clamped onto focuser housing shoe
  • Kellner 25mm and Kellner 10mm eyepieces included for instant observation

Spherical Newtonian Optics & Rack-and-Pinion Focuser

The 102mm primary mirror and planar secondary reflect light efficiently across an f/6.3 focal layout to minimize optical distortion. Fitted with a 1.25-inch rack and pinion focuser, this Omegon tabletop telescope supports useful visual magnifications from 15x up to 204x.

Wooden Tabletop Rocker Base & Red Dot Pointer Finder

Manual navigation is straightforward with the tabletop Dobsonian mount. The Omegon N 102/640 pivots smoothly on altitude and azimuth axes, allowing stargazers to point and center celestial objects without complicated mount setups. Equipped with a red dot finder and two eyepieces, it provides a dependable entry point for visual astronomy.

  • Low-friction wooden tabletop rocker box with side altitude pivot axis
  • Pre-calibrated red dot finder scope for intuitive manual target acquisition
  • Kellner 25mm and Kellner 10mm eyepieces included for wide and close-up views

Omegon N 102/640 Warranty

The Omegon N 102/640 Dobsonian Telescope includes a 2-year limited warranty against manufacturing and material defects. The complete factory package contains the 102mm spherical Newtonian optical tube assembly, wooden tabletop rocker box base, pre-calibrated red dot pointer finder, 1.25-inch Kellner 25mm eyepiece, and 1.25-inch Kellner 10mm eyepiece.

Omegon N 102/640 Dobsonian Telescope Specs

BrandOmegon
Full Model CodeOmegon N 102/640 Spherical Newtonian Reflector Dobsonian Tabletop Mount System
Country of OriginGermany (Designed) / China (Manufactured)
Optical DesignNewtonian Reflector (Spherical Primary Mirror Layout with Planar Secondary Mirror)
Aperture102 mm (4.02 inches)
Focal Length640 mm
Focal Ratiof/6.3
Optical CoatingsStandard Aluminum Coating Treatment with Protective Monoxide Overlay Layer
Glass MaterialStandard BK7 Optical Glass Substrates
Secondary Mirror Obstruction32 mm
Secondary Mirror Obstruction by Diameter31.37%
Secondary Mirror Obstruction by Area9.84%
Resolving Power1.14 Arcseconds (Dawes), 1.35 Arcseconds (Rayleigh)
Limiting Visual Magnitude11.8
Highest Useful Magnification204x
Lowest Useful Magnification15x
Optical Tube MaterialRoll-Formed Heavy-Gauge Steel Cylinder Shell with Synthetic End Protective Trim rings
Focuser Style & Mechanism1.25-inch Standard Rack and Pinion Drive Focuser Array with Manual Tension Adjuster Screw
Mirror Lock MechanismYes (Rear Secondary Pull-and-Push Manual Collimation Retention Screws on Mirror Base)
Optical Tube Dimensions130 mm x 600 mm
Optical Tube Weight2.10 kg (4.63 lbs) - OTA Only / 4.90 kg (10.80 lbs) - Combined Total Assembly Weight
Mount Attachment TypeSide Altitude Pivot Axis Fastened Into Wooden Tabletop Rocker Swivel base
Finder Scope SpecificationRed Dot Finder Assembly Pre-calibrated and Clamped onto Focuser Housing Shoe
Included Accessories102mm Spherical Newtonian OTA, Wooden Tabletop Rocker Box, Red Dot Pointer Finder, 1.25-inch Kellner 25mm Eyepiece, 1.25-inch Kellner 10mm Eyepiece
Standard Warranty2-Year Limited Warranty
ApplicationEasy-to-use manual backyard astronomy tracking deep sky star structures, picking an f/6.3 focal index to organically minimize spherical optical distortion values.

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