Lunt LS100THa Solar Telescope

Lunt LS100THa Solar Telescope



General Features:

  • 100 mm f/7 dedicated h-alpha telescope
  • Internal etalon allows a <0.75 Angstrom bandpass.
  • True Doppler pressure tuning system for precision tuning adjustments.
  • The LS100THa includes a 2″ Starlight Instruments Feather Touch Focuser, aluminum case, a sun- finder, 12″ dovetail and your choice of blocking filter.

A blocking filter is required with this system.
Choose the system with the appropriate blocking filter for your applications.

  1.  No Blocking Filter – You already have a Lunt blocking filter you will be using with this telescope.
  2.  B1200 –  You are planning to use this telescope visually.
  3.  B1800 –   You want a wider field of view and/or plan to do some imaging with a standard camera.
  4.  B3400 – You plan to do imaging and your camera has a large sensor.

Please Note: If this product shows “Available on Backorder” and you would like to “get in line” by placing an order with a 10% deposit, send us an email. A member of our staff will contact you with lead times and deposit information.

Estimated lead time: 1 month

Select Options
No Blocking Filter - See Warnings for this Choice
B1200 Package – with 12mm Blocking Filter Diagonal
B1800 Package – with 18mm Blocking Filter Diagonal
B3400 Package – with 34mm Straight-Thru Blocking Filter


Product Description

The Lunt Solar Systems LS100THa is a complete solar telescope. This refractor-based system has a precision-aligned singlet chromatic lens with a 102 mm aperture. The front singlet lens reduces the stray light over an achromat by half. With the matched collimation lens set, it also fully corrects on-axis coma, astigmatism and de-centering aberrations, and provides a full spherically corrected flat-field solar telescope. The focal length is 714 mm, for an f/ratio of 7. Course focus adjustment is via a slide tube. Focusing is achieved with a high precision 2″ Starlight Feather Touch  focuser with 10:1 reduction as standard equipment. An internal etalon with tune adjustment allows for a <0.7 Angstrom bandpass.

True Doppler Tuning allows for a shift into and away from the user, adding a 3-D 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.

LS100THa Specifications: (single stacked)

  • Optical Aperture: 102 mm
  • Etalon: Internal <0.7 Angstrom
  • Tuning: Internal Pressure Tune (Doppler True Tuning)
  • Focal Length: 714 mm
  • F Ratio: F/7
  • Focuser: 2″ Feather-Touch focuser with 10:1 reduction
  • Tube diameter: 121 mm
  • Tube length with blocking filter: 634 mm
  • Storage: Aluminum finished hard case with fitted foam
  • Weight: 12.2 lb

Included Accessories

  • Optical tube with 2″ Feather Touch focuser with 2.5″ travel
  • B1200, B1800 or B 3400 Blocking Filter
  • Sun Finder: Televue Sol Searcher
  • Mounting: Lunt 12″ Dovetail
  • Case: Aluminum Finished Hard Case with Custom Foam

 Choose an LS100THa with the blocking filter that is right for you:

  • B1200 – for visual use
  • B1800 – for larger field of view and imaging applications
  • B3400 – for larger field of view and imaging applications with larger sensors
  • No Blocking Filter – 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!

Additional Information

Weight 34.00 lbs
Dimensions 37 x 15 x 19 in

No Blocking Filter – See Warnings for this Choice, B1200 Package – with 12mm Blocking Filter Diagonal, B1800 Package – with 18mm Blocking Filter Diagonal, B3400 Package – with 34mm Straight-Thru Blocking Filter

1 review for Lunt LS100THa Solar Telescope


    Have been using this scope for over a year. Totally tricked out with the FT focuser, B1800 BF, and DSII module.
    All I can say is wow, wOW, and WOW. I’m mainly a visual observer so chose this particular model as its the
    minimum size required to see spicules (fuzz around the suns edge).
    Do yourself a favour and hang a binoviewer off it. I do and to be honest I could sit and stare at the sun all day!
    Pressure tuning, yes that’s the only way to fly!

    This scope is a keeper, forever. Thanks Lunt!

Related Products