Explore Scientific FirstLight 203mm f/6 Alt-Az Dobsonian Telescope

Explore Scientific FirstLight 203mm f/6 Alt-Az Dobsonian Telescope

Explore Scientific FirstLight 203mm f/6 Alt-Az Dobsonian Telescope

B&H # EXFL8STD MFR # FL-DOB0806-01
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Value: $35.00

Product Highlights

  • Large 203mm Aperture
  • 1218mm Focal Length, f/6 Focal Ratio
  • Low-Expansion Glass Primary Mirror
  • Borosilicate Glass Secondary Mirror
  • 2.5" Focuser with Reducer Adapters
  • 1.25" 25mm Super Plossl Eyepiece
  • Wide-Field Red-Dot Finder
  • Large, Smooth-Movement Altitude Wheels
  • Floor-Based Manual Alt-Az Mount
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Explore Scientific FL-DOB0806-01 overview

  • 1Description

Sporting a distinctive large aperture and deep light bucket, the Explore Scientific FirstLight 203mm f/6 Alt-Az Dobsonian Telescope gives users powerful performance at a reasonable price. Its large parabolic primary and smaller secondary mirrors are made from low-expansion glass to eliminate distortion across the entire field of view, especially at the edges, while allowing sharp resolution of star clusters and nebulae that smaller apertures cannot achieve.

The fast f/6 focal ratio and hexagonal rack-and-pinion focuser make this an ideal choice for imaging, by enabling shorter exposure times with the ability to achieve tack-sharp focusing with the strength to handle large imaging rigs and eyepieces. This 2.5" focuser is designed to eliminate vignetting when using large wide-field eyepieces when observing, and when using large imaging sensors for astrophotography. Reducer adapters are included allowing the use of both 1.25" and larger 2" eyepieces and accessories.

The heavy base provides a rock-steady platform with very low vibrations. This alt-az rocker mount features Teflon pads on the ground plate, and large altitude wheels for smooth and easy movement along both axes with little vibration. Dual mounting rings allow the OTA to be precisely balanced for even smoother movement, and the altitude wheels can be removed and replaced with a Losmandy-style dovetail plate so the OTA can be used with EQ and GoTo mounts mounted on large tripods or piers.

Optical Tube
  • 203mm (8") aperture
  • f/6 focal ratio
  • 1218mm focal length
  • Optical design: Dobsonian-variant of a Newtonian reflector
  • Low-expansion H-PZ33 glass primary mirror
  • 57mm low thermal-expansion Borosilicate glass secondary mirror resists expansion to limit aberrations
  • Resolution: 0.6 arcsec
  • Alt-az rocker design
  • Large aluminum altitude wheels allow for smooth movement and tracking with reduced vibration
  • Teflon pads on ground plate enable smooth 360° rotation
  • Adjustable mounting rings enable precision balancing when using lighter or heavier accessories for smoother motion
  • Mounting rings allow the altitude wheels to be removed and replaced with a Losmandy-style dovetail for attachment to an EQ, alt-az, or GoTo mount head for tripod/pier use
  • Large 2.5" hexagonal rack-and-pinion design
  • Provides strength and rigidity to handle heavy eyepieces and imaging rigs with little backlash, tilt, or shifting
  • Large drawtube prevents vignetting with wide-field eyepieces during observation, or when using large imaging sensors for astrophotography
  • Includes 2" and 1.25" eyepiece adapters to allow use of a variety of eyepieces and accessories
Included Accessories
    Super Plössl eyepiece:
  • 1.25" diameter barrel
  • 25mm yields 49x power
  • Red-dot finder
  • Wide-field for fast subject acquisition and easy star hopping
UPC: 812257018277
In the Box
Explore Scientific FirstLight 203mm f/6 Alt-Az Dobsonian Telescope
  • Red-Dot Finder
  • 25mm Plossl Eyepiece
  • 2" Eyepiece Reducer Adapter
  • 1.25" Eyepiece Reducer Adapter
  • Focuser Extension Shell
  • Rockerbox Assembly
  • 2 x Tube Clamps
  • 2 x Altitude Wheels
  • Limited 1-Year USA Warranty, Extendable to Transferrable Lifetime Warranty with Registration
  • Table of Contents
    • 1Description

    Explore Scientific FL-DOB0806-01 specs

    Optical Design Dobsonian reflector
    Aperture 203mm
    Focal Length 1218mm
    Focal Ratio f/6
    Eyepiece Barrel Diameter 2" or 1.25", with included adapters
    Diagonal N/A
    Finderscope Wide-field red-dot
    Tripod None
    Mount Type Alt-az rocker mount
    Power Source None
    Optical Tube Dimensions Length: 45.3" / 115.0 cm
    Diameter: 9.8" / 25.0 cm
    Weight Tube: 25.4 lb / 11.5 kg
    Fully Assembled: 46.3 lb / 21.0 kg
    Packaging Info
    Package Weight 64.25 lb
    Box Dimensions (LxWxH) 49.0 x 22.0 x 18.0"

    Explore Scientific FL-DOB0806-01 reviews

    FirstLight 203mm f/6 Alt-Az Dobsonian Telescope is rated 5.0 out of 5 by 1.
    Rated 5 out of 5 by from It’s awesome !!! Love it !!! This telescope it’s just great. I’m a beginner and after several weeks of research; I take the choice to buy this and brin it to my country, Colombia, so can you imagine all the things I had to have in mind...first than nothing It’s huge !!! Second it’s beautiful; I’m a industrial designer and the high end of this product it’s a great, the materials and the details look so nice. The assembly was easy, the up and down system/design is soft, and keep the balance; the only thing maybe you have to do, it’s to re- install the white pieces where the traction happen... this because the employees maybe made an a fast installation and they look crooked, so maybe you have to remove them and put them back correctly ... one of the screw was no deeply, so this generate a track in the tread, very important check this ! The base is very nice and gives an strong support, easy to turn. The super plossl piece it’s nice, I was watching Jupiter and it’s clear ... I buy two more eye pieces ... Meadle 4.5 mm and Orion 8 mm they work nice with the dobsobian. I make a base for moving with 4 wheels because it’s a little heavy. The laser point works fine, you just have to make a set up for a correctly point correctly. I really recommend this telescope, you will not disappointed for the price and the product... easy to assembly, easy to use, easy to love it !! Clear skies !!
    Date published: 2018-05-12
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