TEL: 604-998-7071     Hello Guest, Login / My Account

Explore Scientific 12" Truss Tube Generation II Dobsonian Telescope
Explore Scientific 12" Truss Tube Dobsonian Telescope

Explore Scientific 12" Truss Tube Generation II Dobsonian Telescope

. Use Live Chat for questions. or to leave your message for us to reply to within a couple of hours.
. Satisfaction Guarantee: 30 Days no Hassle Return (Terms & Conditions Applies)
. Multiple Payment Options ( All Debit, Credit Cards, EMT, Wire Transfers, Financing)
. Canadian Based Company, 100% Secure Ordering

Your Price: CAD2,699.00
Retail Price:CAD2,851.08

Your Savings:CAD152.08(5%)

Usually ships in 5-7 business days
Part Number:DOB1245-01

Choose Options or Accessories if Applicable

Explore Scientific DOB Telescope Accessories
ES-DOB1012SHR Explore Scientific Shroud for 10" and 12" Truss Tube DOB (+CAD149.00)
ES-DOB16SHR Explore Scientific Shroud for 16" Truss Tube DOB (+CAD199.00)
DOB-CW DOB-Counter Weight Set for DOB1045-00, DOB1245-00, DOB1645-00 (+CAD99.00)
Ships Worldwide - Estimate import fees, duties, and taxes. help
Product Highlights
  • 12" / 305mm Aperture
  • 1525mm Focal Length, f/5 Focal Ratio
  • 10:1 2" Two-Speed Helical Focuser
  • Red-Dot LED Finderscope
  • Floor-Based Manual Alt-Az Mount
  • Altitude Tension Clutch
  • Dual Radial Main-Mirror Fans
  • Tool-Free Breakdown and Assembly

This is a Generation II telescope. All updates have been performed on this telescope.

Sporting the large light bucket users have come to expect from a Dob, the Explore Scientific 12" f/5 Truss Tube Dobsonian Telescope gives users awe-inspiring performance at a reasonable price. Its large parabolic primary mirror is highly reflective and is engineered to correct spherical aberration which eliminates distortion across the entire field of view, especially at the edges. The large 12" aperture draws in copious amounts of light to show the minutia on the Moon and planetary surfaces, reveal deep sky objects that smaller scopes simply cannot not see, and resolve bright star clusters to their core. Its f/5 focal ratio and 10:1 dual-speed helical focuser makes this an ideal choice for imaging. The fast focal ratio enables devices to capture images in less time than slower scopes, while the unique focusing mechanism employed in the helical design gives it the ability to achieve tack-sharp focusing with zero backlash that rack-and-pinion focusers are generally unable to. This 2" focuser will accept larger eyepieces so users can enjoy a truly immersive visual experience and will ensure larger imaging sensors are completely covered.

The rocker box weighs-in at just over 15 pounds and provides a rock-steady observational platform with very low vibration. This rocker mount features high-altitude bearings with aluminum structures that allow for fine adjustment flows at high magnifications, and dual radial primary mirror fans to quickly adjust the temperature to reduce mirror distortion. Finally, the tension control handle allows users to adjust the settings allowing them to move the mount easily and smoothly by hand with minimal vibration and maintain its position when released.

  • 12" aperture
  • f/5 focal ratio
  • 1525mm focal length
  • Highly reflective mirrors increase image brightness
  • 24% secondary mirror obstruction
  • Dual radial primary mirror fans adjust the mirror temperature to reduce distortion
    • Runs on eight user-supplied AA batteries
  • Manual rocker mount design
  • High altitude bearings for a wide adjustment and travel range
  • Tension control handle allows for smoother rotation to reduce vibrations and limit over-compensation
  • Dual-speed helical
  • Accepts 2" eyepieces and accessories
  • Helical focusers use a toothless design that allows for smooth and precise focusing without backlash
Optical design
Newtonian Reflector
Mount Type
Objective diameter (mm)
Focal length (mm)
Maximum recommended magnification
DeLuxe Red Dot Finder
Field of application
Deep Sky Observation
Lunar observation
Planetary observation
Angular resolution (arc seconds)
Mount type
Focus Group
Visual enthusiasts
Advanced Amateurs
Warranty (Years)
Eyepiece Barrel Diameter (mm)
Secondary mirror diameter (mm)
Obstruction (%)
Material OTA
Focusing system
2" Crayford-Focuser with 10:1 Reducer
Rain/Dust protection caps
Dust protection caps for open aperture and eyepiece holder
Primary mirror diameter (mm)
Aperture ratio
very good
Net Weight total (incl. accessories) (kg)

Packaging Info

Package Weight 99.85 lb
Box Dimensions (LxWxH) 40.08 x 21.7 x 18.1"

In the Box
Explore Scientific 12" f/5 Truss Tube Dobsonian Telescope
  • Red Dot LED Finderscope
  • Collimation Assist Tool
  • Limited 1-Year Warranty, Extendable to Transferrable Lifetime Warranty with Registration

  • Suggested Accessories: 2-inch HR Coma Corrector ; Explore Scientific Waterproof Eyepieces ; Focal Extenders

    Related Items

    Recently Viewed Items