Lunt 80mm – Double Stack – 18mm Blocking Filter – Feather Touch Focuser – Zoom Eyepiece

Code: LS80THaDS-4


Within the continental United States for orders over $100.00.

  • Lunt Solar Systems 80 mm f/7 dedicated h-alpha telescope.
  • Dual Internal Etalons: True Doppler pressure tuning for precision tuning adjustments.
  • LS80Tha/PT/DSII Double Stack Module
  • 2″ Feather Touch Focuser
  • 18mm Blocking Filter
  • Sun-Finder
  • Lunt Zoom Eyepiece
  • Aluminum Case
  • Dovetail


In stock (can be backordered)

In stock (can be backordered)




Walkthrough of the Lunt 80mm H-Alpha Pressure Tuned Solar Telescope. Learn about the telescope and which options are right for you for:

  • Blocking Filters
  • Focusers
  • Sol-Searcher
  • Dovetail Mount
  • Eyepieces

All Lunt Solar Systems Solar Telescopes require a blocking filter.

Which blocking filter is right for you?

B1200 – You are planning to use this telescope visually.
B1800 – You want a wider field of view and/or plan to do some imaging with a standard camera.

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Get a 360° View of the Lunt Solar Systems 80mm Pressure-Tuned H-Alpha Solar Telescope

Images taken through this telecsope

Lunt Solar Systems

The Lunt Solar Systems LS80THa/PT is a complete and dedicated solar telescope. A precision aligned ED refractor with a fully un-obstructed 80 mm optical aperture, this package provides a significant step up into the intermediate category of solar observing. The LS80THa/PT (PT = Pressure-Tuned) maintains the most advanced technology of Doppler True Tuning for fine adjustment of the center wavelength, allowing research of the Sun’s disk and surface details at increased image scale. Prominences, flares, super granulation, filaments, and active regions will be observed.

True Doppler Tuning allows for a shift into and away from the user, adding a 3D-like component to the viewing experience. While it has minimal effect on proms due to their location at the edge of the disk, it does have an effect on filaments and active regions on the surface. While looking at a filament at the center of the Sun, the user has the ability to Doppler shift from the base of the filament to the tip, following the filament through it’s structure toward you and away from you, allowing for enhanced visual and imaging capability for the observer as well as a research tool for the avid hobbyist. The pressure tuning system provides an order of magnitude more precision to the tuning of the desired features.

The LS80THa package is fully upgraded with the evolutionary Dual Internal Stack Etalon System (DSII). The DSII eliminates the need for an external doublestack etalon, reducing cost and eliminating obstructions. The system is 100% un-obstructed. The bandpass is reduced to <0.5 Angstroms, allowing you to see the Sun’s weather in stunning high definition. 

LS80THa/PT Specifications: (single stacked)

  • Optical Aperture: 80 mm (Unobstructed)
  • Etalon: Internal Tuning: Internal Pressure Tune (Doppler True Tuning)
  • Focal Length: 560 mm
  • F Ratio: 7
  • Focuser: 2″ Feather Touch
  • Mounting: Integrated clamshell style with 1/4-20 tapped base
  • Storage: Aluminum finished hard case with fitted foam
  • Weight: 8.8 lb

Included Accessories:

  • Sun Finder: Tele Vue Sol Searcher
  • Mounting: Lunt 6″ Dovetail
  • Eyepiece: Lunt Zoom Eyepiece
  • Blocking Filter:  B1800 
  • Case: Aluminum Finished Hard Case with Custom Foam

Choose an LS80THa with the blocking filter that is right for you:

B1200 – for visual use
B1800 – for larger field of view and imaging applications
No Blocking Filter Warning – only choose this package if you already have a Lunt Solar Systems blocking filter at your disposal. All Lunt Solar Systems h-alpha telescopes require a Lunt Blocking Filter!

See the latest news about the sun from NASA.

Additional information

Weight 35 lbs
Dimensions 37 × 15 × 19 in

B1200C – 12mm Blocking Filter with 2" Crayford Focuser, B1200FT – 12mm Blocking Filter with 2" Feather Touch Focuser, B1800C – 18mm Blocking Filter with 2" Crayford Focuser, B1800FT – 18mm Blocking Filter with 2" Feather Touch Focuser, LS80THa – NO Blocking Filter NO Focuser – See Warnings for this Option, LS80THa – NO Blocking Filter with 2" Crayford Focuser – See Warnings for this Option, LS80THa-NO Blocking Filter with 2" Starlight Inst. Feather Touch – See Warnings for this Option


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