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Lunt Solar Systems

Lunt Solar Systems

The solar specialist, in full

Hydrogen-alpha solar telescopes from 40mm to 230mm, etalon filter sets to convert a refractor you own, and the accessories that go with them.

32In stock
40–230mmAperture
$19.99From
  • Lunt SunLock solar finder shown mounted on a solar telescope
    Lunt SunLock Solar Finder
    Lunt Solar Systems

    Lunt SunLock Solar Finder

    $49.99

    Center The Sun Without Looking Through Anything The SunLock finder from Lunt lets you aim your telescope at the Sun without sig...

    View full details
    $49.99
Lunt Solar Systems

The Company That Only Makes Solar Instruments

Most telescope manufacturers treat solar as a sideline. Lunt do nothing else. Every etalon, blocking filter and pressure tuner they build exists to do one job — put the hydrogen-alpha Sun in front of your eye safely and in as much detail as the aperture allows.

The range runs from the 40mm LS40THa, which will show you prominences on the limb from a suburban garden, up to the LS230THa double stack, an instrument built for observatories. In between sit the MT universal telescopes that work on the Sun by day and deep sky at night, and the filter sets that convert a refractor you already own.

Solar filtering is not a place to improvise. Everything on this page is a purpose-built Lunt product, and we will tell you honestly whether a filter set fits your telescope before you order it.

Lunt LS50THa 50mm hydrogen-alpha solar telescope
SAFETY
FIRST

We will tell you if a filter does not fit your telescope

An improvised or ill-fitting solar filter is not a cosmetic problem. Every product here filters the light at the front of the telescope or inside a sealed etalon module built for the purpose.

Send us your telescope model before you order a filter set and we will confirm the fit. If it does not fit, we will say so rather than sell it to you. Call +1 (855) 501-0541.

1

Solar is all they do

Lunt build nothing but solar instruments, and it shows in the detail the etalons resolve.

2

Pressure tuned, not tilt tuned

Barometric tuning shifts the passband evenly across the whole disk rather than across a tilted wedge.

3

Fitment confirmed before shipping

Tell us your telescope and we check the filter set against it first.

4

Free shipping on all of it

Every Lunt product on this page ships free within the United States.

What Lunt make

Three families, plus the accessories that go with them. Counts are what we have in stock today.

Dedicated solar telescopes

13 models in stock

Complete hydrogen-alpha instruments with the etalon built in, from 40mm to 230mm.

  • LS40THa and LS50THa for a first solar scope
  • LS60MT to LS130MT universal day and night
  • LS152THa and LS230THa for observatories
See these →

Filters and etalon modules

9 sets in stock

Convert a refractor you already own, or add a double stack to sharpen a telescope you already have.

  • Full aperture etalon filter sets
  • B600 to B3400 blocking filters
  • Double stack modules and Calcium K
See these →

Accessories and optics

9 in stock

Solar-tuned eyepieces, binoviewers, SunLock finders, pressure tuner controllers and hard cases.

  • Solar eyepieces and the Tecnosky binoviewer
  • SunLock finder and clamshell rings
  • Focusers, cases and dovetail bars
See these →

Compare the Lunt solar telescopes

The models people choose between most often. Prices are the lowest configuration on this site.

Model Aperture Type Best for From
LS50THa 50mm Dedicated H-alpha A first dedicated solar scope From $995.99
LS60MT 60mm Universal day and night One telescope for Sun and sky From $1,195.99
LS80MT 80mm Universal day and night Finer filament detail, ED at night From $2,595.99
LS100MT 100mm Universal day and night Serious aperture, still portable From $4,195.99
LS152THa 152mm Dedicated H-alpha Research-grade surface detail From $7,849.99

Aperture sets resolution on the Sun exactly as it does at night. Bandpass — how narrow the etalon is — sets how much surface contrast you see.

Three ways into solar observing

Which route suits you depends on what you already own.

01

Buy a dedicated solar telescope

The simplest path. The etalon is built in and nothing needs to fit anything else.

Jump to these →
02

Convert a refractor you own

A full aperture etalon filter set turns a night-sky refractor into a solar instrument.

Jump to these →
03

One telescope for both

The MT series works in hydrogen-alpha by day and as an ED refractor after dark.

Jump to these →

The Lunt range

Grouped by what it is. Everything here is in stock.

Solar telescopes

Lunt 130mm Solar Ready Telescope Kit
Solar Telescope

Lunt 130mm Solar Ready Telescope Kit

From $7,495.99
View details →
Lunt LS100MT 100mm Universal Day and Night Telescope
Solar Telescope

Lunt LS100MT 100mm Universal Day and Night Telescope

From $4,195.99
View details →
Lunt 100mm Solar Ready Telescope Kit
Solar Telescope

Lunt 100mm Solar Ready Telescope Kit

From $3,495.99
View details →
Lunt LS80MT 80mm Universal Day and Night Telescope
Solar Telescope

Lunt LS80MT 80mm Universal Day and Night Telescope

From $2,595.99
View details →
Lunt 80mm Solar Ready Telescope Kit
Solar Telescope

Lunt 80mm Solar Ready Telescope Kit

From $3,295.99
View details →
Lunt LS60MT 60mm Universal Day and Night Telescope
Solar Telescope

Lunt LS60MT 60mm Universal Day and Night Telescope

From $1,195.99
View details →

Filters and etalon modules

Lunt H-Alpha Blocking Filter
Solar Filter

Lunt H-Alpha Blocking Filter

From $395.99
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Lunt 100mm Full Aperture H-Alpha Etalon Filter Set
Solar Filter

Lunt 100mm Full Aperture H-Alpha Etalon Filter Set

From $4,895.99
View details →
Lunt High Resolution Glass Upgrade
Solar Filter

Lunt High Resolution Glass Upgrade

From $249.99
View details →
Lunt 60mm Full Aperture H-Alpha Etalon Filter Set
Solar Filter

Lunt 60mm Full Aperture H-Alpha Etalon Filter Set

From $2,195.99
View details →
Lunt Polarizing Filter Unit
Solar Filter

Lunt Polarizing Filter Unit

From $26.99
View details →
Lunt 50mm Full Aperture H-Alpha Etalon Filter Set
Solar Filter

Lunt 50mm Full Aperture H-Alpha Etalon Filter Set

From $1,495.99
View details →

Accessories and optics

Lunt Terrestrial Star Diagonal
Telescope Accessory

Lunt Terrestrial Star Diagonal

$45.99
View details →
Lunt Hard Carry Case for Solar Telescopes
Telescope Case

Lunt Hard Carry Case for Solar Telescopes

From $120.99
View details →
Lunt Telescope Adapter
Telescope Accessory

Lunt Telescope Adapter

From $19.99
View details →
Lunt PC-USB Pressure Tuner Controller
Telescope Accessory

Lunt PC-USB Pressure Tuner Controller

$995.99
View details →
Lunt Tecnosky Horizon Binoviewer
Binoviewer

Lunt Tecnosky Horizon Binoviewer

$499.99
View details →
Lunt Solar Telescope Eyepiece
Eyepiece

Lunt Solar Telescope Eyepiece

From $89.99
View details →

Lunt questions, answered

The questions we field most often on the phone.

Is it ever safe to point a telescope at the Sun without a proper filter?

No. An unfiltered telescope aimed at the Sun concentrates enough energy to cause permanent eye injury in a fraction of a second, and it will destroy an eyepiece or a camera sensor just as fast. Every product on this page filters the light before it reaches you.

What is pressure tuning and why does it matter?

Lunt shift the etalon's passband by changing the air pressure inside the housing rather than by tilting the glass. Tilting moves the tuning across the field, so one edge of the disk is tuned and the other is not. Pressure tuning keeps the whole disk evenly tuned, which is why filaments and surface texture come up cleanly.

What does the blocking filter number mean?

B600, B1200, B1800 and B3400 refer to the diameter of the blocking filter in microns. A larger blocking filter passes a larger fully illuminated field, which matters as aperture and focal length increase, and for imaging with a larger sensor. Bigger is not always necessary — it is matched to the telescope.

Can I convert a telescope I already own?

If it is a refractor, usually yes, with a full aperture etalon filter set sized to the front of the tube. Send us the make, model and the outside diameter of the dew shield and we will confirm which set fits before you order.

Single stack or double stack?

A single stack shows prominences on the limb and the larger active regions clearly. A double stack narrows the bandpass further and brings up filaments and surface texture across the disk. If your main interest is the disk rather than the limb, the double stack is the upgrade that matters.

Where to go next

Solar observing crosses several categories. These are the pages for each.

Solar Telescopes

13 purpose-built models

Solar Filters

9 filters and etalons

Observation Accessories

Binoviewers, finders, diagonals

Focusers

Helical and rack-and-pinion

Cases, Covers & Shrouds

5 cases

Explore Scientific

The night-sky range

Buyer's Guide

How to choose your first telescope

Talk to us

We answer the phone