SKU: 11932859219

LS40THa Premium Kit - 40mm Dedicated H-Alpha Solar Telescope

Sale price$807.75 Regular price$897.50
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Description

LS40THa Premium Kit - 40mm Dedicated H-Alpha Solar TelescopeLS40THa Premium Kit 40mm Dedicated H Alpha Solar Telescope Double stack performance in a grab and go package. Now with new generation etalons every unit individually tested on Lunt's precision metrology equipment. Every specification is verified, not estimated. Now with new generation etalons every unit individually measured at 656. 28nm on Lunt's precision metrology equipment. Every specification is verified, not estimated. The LS40THa Premium Kit

LS40THa Premium Kit — 40mm Dedicated H-Alpha Solar Telescope Double-stack performance in a grab-and-go package.

Now with new-generation etalons — every unit individually tested on Lunt's precision metrology equipment. Every specification is verified, not estimated.

Now with new-generation etalons — every unit individually measured at 656.28nm on Lunt's precision metrology equipment. Every specification is verified, not estimated.

The LS40THa Premium Kit delivers the finest double-stack performance available in any 40mm solar telescope. The front-mounted LS40FHa double-stack filter adds a second 0.45Å tilt-tuned etalon to the optical path, placing two etalons of equal specification in series. Combined system bandpass: <0.29Å — tighter than any other double-stack combination in the Lunt range, and a level of chromospheric contrast no competitor in this aperture class can match.

This is serious H-alpha equipment in a genuinely portable package. At 2.6 pounds with a 10:1 dual-speed rack-and-pinion focuser, a 7.2–21.5mm zoom eyepiece, and an extended 6" Vixen dovetail for balanced mounting with the DS filter in place, the Premium Kit is configured for the observer who wants the maximum from 40mm aperture — at the eclipse site, in the field, or at home.

What You'll See

At <0.29Å combined bandpass, the chromosphere reveals structure invisible at single-stack bandwidths. Plage boundaries sharpen into defined cellular networks. Filaments resolve into complex multi-strand structures with dark cores and distinct edges. Active regions display the full depth of their magnetic architecture. Prominences show internal threading and flow patterns from base to tip that single-stack instruments render as smooth, featureless arcs. The chromosphere stops being a texture and becomes a landscape.

The 7.2–21.5mm zoom eyepiece lets you scan full-disk context at 19x, then push in to 56x on active regions without changing glass — critical when conditions are changing and solar features are evolving faster than eyepiece swaps allow.

Why This Package

The LS40FHa Double Stack filter is included. The 10:1 dual-speed R&P focuser provides the micro-adjustment precision that sub-quarter-angstrom observing demands. The 6" Vixen dovetail provides the extended rail length to balance the system with the DS filter mounted. Every unit is individually assembled, bench-tested, and monochromator-verified before leaving Tucson.

Package Includes

  • LS40THa OTA: 40mm aperture, 400mm FL, f/10. Front-mounted tilt-tuned etalon, 0.45Å bandpass. Full unobstructed aperture. Dedicated H-alpha solar telescope.
  • LS40FHa Double Stack: 40mm front-mounted tilt-tuned etalon. Combined system bandpass <0.29Å — two 0.45Å etalons in series. No central obstruction. Includes adapter. ~1 lb.
  • B600 Blocking Filter: 1.25" diagonal housing, 6mm clear aperture. Optimised for LS40 focal length and image scale.
  • 1.25" R&P Focuser (10:1 dual-speed): CNC-machined aluminium/brass. Integrated brake with variable drag. Rotatable. 6–8 lb capacity.
  • SunLock Solar Finder: Red dot projection onto glass reticle. Internal 3-point alignment screws. Red anodised aluminium.
  • 6" Vixen Dovetail Plate: 150mm length, black anodised aluminium. Three 1/4-20 tapped holes. Extended rail for balanced mounting with DS filter.
  • Hard Case: Silver aluminium, 18.5" x 10.5" x 7". Custom-fit foam insert.
  • 7.2–21.5mm Zoom Eyepiece: 7 elements/4 groups. 0.1% AR coatings. 15mm eye relief. 53°–40° FOV. Near-parfocal.

Key Specifications

  • Aperture: 40mm, full unobstructed
  • Focal Length: 400mm
  • Focal Ratio: f/10
  • Etalon Type: Dual front-mounted tilt-tuned (LS40THa + LS40FHa)
  • Single Stack Bandpass: 0.45Å — individually verified
  • Double Stack Bandpass: <0.29Å combined — two 0.45Å etalons in series
  • Blocking Filter: B600 (6mm clear aperture)
  • Focuser: 1.25" CNC R&P, 10:1 dual-speed, integrated brake, rotatable
  • Eyepiece: 7.2–21.5mm zoom (19x–56x on LS40THa)
  • Weight: ~2.6 lbs OTA + ~1 lb DS filter
  • Telescope Type: Dedicated H-alpha solar — daytime use only
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 11932859219

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Beniamin Grigoryan
Alexandria, US
★★★★★ 5
It looks really cool and striking.
Color: Grey, Color: Grey
Really cool and beautiful watch. Although my specific unit runs 5 seconds fast every day—at first it’s annoying, but eventually you stop caring. 🤣
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Reviewed in the United States on April 16, 2026
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Paul Andreini
Dallas, US
★★★★★ 5
A Beautiful Timepiece at an Awesome Price!!
Color: Grey, Color: Grey
I have lusted after this watch for four months. I first tried on a similar model (stainless steel band with a green face) in a local jewelry shop (Spitz Jewlers, Walnut Creek, CA, USA). It was "love at first sight," even if I didn't love the white lines on the face from 12-6 and 3-9. At the time, the MSRP was $775. The MSRP has since increased to $795. But I bought this beauty on Amazon.com for only $524.99; after applying the cash-back from my Prime credit card, this watch costs only $498.75. This was "the offer that I could not refuse," to quote from "The Godfather." Accuracy could be better: after only a few days, it is now 7 seconds behind my phone (to which I set my new watch). But I don't really care about that all that much. This is why I rated "accuracy" at 4 stars, but my overall review is 5 stars. My video shows the date changing suddenly at 11:59:59pm, just how I want it; in another photo, you can see that my Seiko changes the date more slowly, which I do not like. This watch is absolutely phenomenally beautiful. If you're on the fence over whether to make this purchase, then I would say "go for it!" You will not find a prettier, more accurate watch at a lower price in ANY store in the entire USA.
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Reviewed in the United States on April 28, 2023
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pradeepkanth
San Leandro, US
★★★★★ 4
Classy and sporty. Great value!
Color: Grey, Color: Grey
Excellent watch for the price. Looks sporty and dressy. More towards dress watch. Blue is dynamic. Strongly recommend blue for sporty feel. I was thinking of aqua terra. This come close to it with a price less than what i would have paid my state tax for omega aqua terra. My only concern is bracelet which i feel kind of OK. Better bracelet design would have made this watch much superior. 21 lug width is awful. Other than that, nothing to complain.
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Reviewed in the United States on July 13, 2020
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Tim Shepherd
Pawtucket, US
★★★★★ 5
Stunning Gentleman's Watch
Color: Grey
This is my second Tissot watch. It's quite stunning in person. The online photos don't do it justice. It has the look and feel of a much more expensive gentleman's watch which makes this purchase a great bargain. Tissot is a great reliable Swiss made watch brand. My first Tissot watch which is probably more than 20 years old still runs great. Very pleased with this purchase.
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Reviewed in the United States on October 16, 2025
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L.Lopez
Los Angeles, US
★★★★★ 5
Good Tissot Watch
Color: Grey
Arrived on time, in its original box, include a 2 year international warranty, into the box include a book with the Tissot brand history in Switzerland. Algo a second book with a whole catalog of Tissot watches men and women. The watch looks better when you put in on your wrist. The “naval” blue really gives the clock a classy look. The stainless steel workmanship is really good, the metal is bright and perfectly polished. The metal wristband quality is very good, did not have any problem to adjust the size , I went to my preferred clock workshop for this job, they extracted a few pieces of the band to fit to my small wrist size. Have to get used to the butterfly latch, but after a few days, now I learned to open and close it without any effort. The clock it’s very accurate, I’ve been using my Tissot for near a month and it just increased a few seconds per week. I do the setup and check accuracy with my pc clock. In short, It”s a good value watch, nice, good looking, accurate.
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Reviewed in the United States on August 1, 2021

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