40mm Solar Telescope


40mm Solar Telescope

Regular price
$ 675.00
Sale price
$ 675.00
Unit price

This item is out of stock but you can place an order now and we’ll ship when it becomes available.

The all new Lunt 40 mm Solar Telescope provides the basic essentials perfect for a first-time introduction to solar observing.

A true grab-and-go dedicated hydrogen alpha telescope, the Lunt 40 mm F/10 system is sure to impress — allowing both amateurs and seasoned professionals to experience the awe-inspiring phenomena of our closest Star!

Easily portable and a joy to use, the Lunt 40 mm joins the Lunt Telescope lineup as our smallest aperture offering, while providing the power, amazing detail and quality you expect from a Lunt Telescope — all at an impressive ~4.0 mm Solar image size!

This scope includes a non-rotating helical focuser, integrated Vixen Style Dovetail and a 5 mm blocking filter for both visual and photography purposes.

Experience the thrill of viewing the Sun’s explosive activity with Lunt’s entry-level 40 mm Dedicated H-Alpha Solar Telescope. Surface detail, hot spots, prominences and more — all available in the stunning Hydrogen Alpha wavelength.



  • The New Lunt 40mm Solar Telescope is a F/10 hydrogen-alpha dedicated telescope.
  • External Full Aperture Lunt Etalon with tilt-tuning adjustment allows for a 0.65 Angstrom bandpass.


  • System Wavelength: 656.28nm. Hydrogen-alpha (tuneable, dedicated)
  • System Focal Length: f10
  • Sun Image Size: 3.67mm
  • Objective: Precision Doublet (Optimized at 656nm)
  • Blocking Filter: 5mm standard (upgradeable to 6mm or 12mm)
  • Etalon Size: 40mm full aperture precision Lunt Etalon
  • Etalon Peak Transmission: >88%
  • Etalon Net Finesse: 19
  • Etalon FSR (Free Spectral Range): 12 Angstroms
  • Etalon Tuning: Conventional Tilt through +/- 1 Angstrom
  • Etalon FWHM (Bandpass): <0.65 Angstrom
  • Weight of Telescope: 2.8lbs

Additional Features:

  • Integrated Vixen Style dovetail plate (included) with integrated 1/4-20 tapped holes in base for camera mounts
  • Non-rotating helical focuser (included) (upgrade to FT available)
  • Sol-Searcher (Included)
  • DS (Doublestack) available by pre-order soon (Optional accessory) (not included)(Price TBD (~US$499)
  • Fitted Foam
  • Color: Pearl White with Black and Red accents

Suggested Accessories: (not included above)

  • Hard Case (Lunt 40mm/ LS50THa Case)
  • Lunt Zoom Eyepiece
  • Lunt 19mm Eyepiece
  • 6mm or 12mm (imaging) Blocking Filter
  • Doublestack Filter (TBD)
  • Solar Tracking Mount


  • Bandpass FWHM:
    • Lunt 40mm (Single Stack): <0.65 Angstrom External Etalon
    • Coronado PST (Single Stack): Sub-Angstrom <1.0 Angstrom Internal Etalon
  • Etalon Size: 
    • Lunt 40mm: External 40mm clear aperture (no obstruction)
    • Coronado PST: Internal 18mm clear aperture (no obstruction)
    • Coronado 40mm: External 40mm obstructed
  • Tuning:
    • Lunt 40mm: Conventional front mount tilt tune
    • Coronado PST: Internal Mechanical Compression
  • Blocking Filter:
    • Lunt 40mm: 5mm standard, Upgradeable to 6mm or 12mm
    • Coronado PST: Fixed 5mm, NOT upgradeable
  • Focuser:
    • Lunt 40mm: Non-rotating Helical, Upgradeable to Feather Touch
    • Coronado PST: Internal sliding pentaprism, NOT upgradeable
  • Sun Finder:
    • Lunt 40mm: Tele Vue Sol Searcher included (alignable)
    • Coronado PST: Inegrated Sun Finder (not alignable)
  • Mount Attachment:
    • Lunt 40mm: Vixen Style dovetail with integrated 1/4-20 tapped holes for camera mounts included
    • Coronado PST: 1/4-20 tapped holes in base. Dovetail an added option
  • Country of Manufacture:
    • Lunt 40mm: USA (Tucson, Arizona)
    • Coronado PST: Mexico
  • Etalon Specification:
    • There is no comparing Lunt Etalon specifications with any other brand. Other brands simply do NOT provide their specifications. Compare and SEE the difference a Lunt Etalon makes.

Personal Upgrade Path

Buy risk-free: When it’s time to trade up you’ll get the most value for your used gear.