SKU: 11932859219

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

Sale price$807.75 Regular price$897.50
Save 10%

Pay in installments of $224.38 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 4 - Aug 9

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

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

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.8 ★★★★★
Based on 24 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
K
Verified Purchase
Kevin Keegan
Whiting, US
★★★★★ 3
Runs large
Size: 7 Big Kid, Color: White
Runs very large.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 5, 2026
L
Verified Purchase
Lou
Port Orchard, US
★★★★★ 5
a little roomy for narrow feet.
Size: 6 Big Kid, Color: Black/Black
Nice shoes. My little one has narrow feet so they are a little lose. Overall, a nice shoe.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 4, 2026
K
Verified Purchase
KNE
Whiting, US
★★★★★ 5
comfortable
Size: 7 Big Kid, Color: Black/Black
super comfortable!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
M
Verified Purchase
Mike Summers
Lexington, US
★★★★★ 5
Great shoes
Size: 5 Big Kid, Color: Navy/Blue
Loved them but bought a size too small so had to buy another pair…my bad 🤦🏽‍♀️
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
T
The Pacific Northwesterners
Whiting, US
★★★★★ 4
Comfortable and Easy to Wear Daily
Size: 2 Little Kid, Color: Navy/Blue
My daughter has been wearing these navy/blue shoes since the weather has been less rainy and more sunny. They are great for outdoor play, especially on days when it's warm outside. The knit mesh upper keeps her feet from overheating, and the cushioned insole feels supportive without being stiff. At size 2, the fit is accurate and the width runs a bit roomy, which gave her some growing room without feeling loose. The slip-on design with elastic laces and pull tabs is a real plus. She can get them on and off without any help, which she loves. The shoes are light enough that she barely notices them during long active days. My one small complaint is that the sole feels more like firm foam than rubber, so they can be a little slippery on smooth indoor floors. For the price, these deliver solid everyday value. They look good, hold up well to regular use, and my daughter reaches for them first most mornings. Pros: - Breathable mesh keeps feet cool - Easy slip-on design with elastic laces and pull tabs - Lightweight and comfortable for all-day wear - Accurate sizing with a roomy width - Durable for the price Cons: - Sole can be slippery on hard smooth surfaces - Limited outsole grip compared to rubber-soled shoes
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 1, 2026

recommand products