Lunt 152mm H-Alpha Solar Telescope with 2" Rack & Pinion Focuser and BF1800 - LS152THa/B1800RP

Out of stock
Regular price $13,058.48 CAD

Product details

  • SKU LUN-LS152THa/B1800RP


About the Lunt 152mm H-Alpha Solar Telescope

This Lunt 152THa comes with a 2" Rack & Pinion Focuser and B1800 Blocking Filter.  The B1800 is good for visual use and photography with standard sensors.  For full frame sensors, choose the B3400 model, which will provide you with a wider field of view. You will also receive mounting rings and a dovetail, the Lunt Zoom Eyepiece, dust caps, and an aluminum reinforced case.

The Lunt 152mm H-Alpha Solar Telescope is perfect for the ambitious solar observer! If it's a perfect image you're after, the LS152THa Lunt Solar Telescope provides a very large and high resolution image size. The 100% unobstructed system will perform to the highest level at both low and high magnifications. Utilizing both advanced hi-contrast coatings, and the new Doppler True Pressure Tuning system, the user will be able to experience crisp, sharp, high magnification visual images, as well as utilize this Lunt Solar Telescope system for high end digital processes.

An internal etalon with new air-pressure tuning adjustment incorporated into the Lunt 152mm H-Alpha Solar Telescope allows for a Lunt Solar Telescope Pressure Tuner system adapted the Etalon to varying altitudes and atmospheric pressures for always optimal performance. 

The Lunt 152mm H-Alpha Solar Telescope is a 6" refractor for solar observing: 152 mm aperture, 900 mm focal length, 100% unobstructed, and a bandwidth of Lunt Solar Telescope for professionals! If it is the perfect solar image you are after, then the LS152THa is the right Lunt Solar Telescope system for you. It provides a large image size and high resolution. The system will perform to the highest level at any magnifications. Utilizing advanced hi-contrast coatings and the new air-pressure tuning system "Pressure Tuner", the Lunt Solar Telescope user will be able to experience crisp, sharp, high-magnification visual and digital images.

What is the "Pressure Tuner" system built into the Lunt 152mm H-Alpha Solar Telescope?

The air pressure of the atmosphere varies, depending on if you are at sea level or on a mountain. Unfortunately also the sensitive Lunt Solar Telescope Etalon filter systems respond to these air pressure variations. The wavelength range that is allowed through the filters, shifts as a function of the air pressure. This shifting is indeed minimal, but at bandwidths of less than one Angstrom it is already clearly visible. If the filter is not adjusted precisely to the H-alpha wavelength, the image of the sun through the Lunt Solar Telescope degrades, prominences and surface details are no longer visible. Therefore, the Etalon filter systems have to be adjusted to the prevailing air pressure at the observation location. This Lunt Solar Telescope Tuning called adjustment is typically done by a mechanical tilting of the filter. At sizes of a few Angstrom, it is obviously not easy to achieve the exact adjustment by mechanical tilting. And because the filter is no longer perfectly straight in the beam path, but slightly oblique, there may also be optical failures.

The new air-pressure system "Pressure Tuner" by Lunt Solar Telescope takes a different path. The Etalon filter, part of the Lunt 152mm H-Alpha Solar Telescope, will not be tilted to only simulate a balance to the air pressure, but the air pressure in the filter system is in fact adapted by 100 percent to the real external air pressure. Thereafter the air surrounding the Lunt Solar Telescope Etalon can simply be compressed or decompressed by the tuning system in order to change the air pressure between the surfaces. This allows the Etalon surfaces to always remain at the same perfect angle to the light waves but changes the diffractive index of the air in the chamber and thus accomplishes the same tuning expect that it goes around + or - 0.4 Angstrom on either side of the centerline. Therefore, the patent-pending "Pressure Tuner" system from Lunt Solar Telescope is also called "True Doppler Tuning", and it achieves much better results than conventional tuning systems.

Lunt 152mm H-Alpha Solar Telescope


  • Advanced Narrow Band Hydrogen-alpha Dedicated System.


  • A refractor based system with a 152mm front objective.


  • An unobstructed internal HD Etalon with the new Pressure Tuner allows for


  • The system includes the mounting rings and dovetail and dust caps


  • Pressure Tuner system


  • B1800 blocking filter in 2" Diagonal with T2 connection


  • 2" Rack & Pinion Focuser


  • Tube Rings with dovetail


  • Lunt Zoom Eyepiece


  • Transport case


Lunt 152mm H-Alpha Solar Telescope - BF1800 - Pressure Tuner Specifications...

Optics Type: Dedicated H-Alpha Solar Telescope

Type: Single Interference HD Etalon

Tuning: air-pressure tuning system

Aperture: 152 mm

Focal Length: 900 mm

Focal Ratio: F6

Focuser: 2" Rack & Pinion

Color: Pearl White with Black and Red accents

Weight: 14 kg

Diagonal: B1800 Blocking Filter in 2" Diagonal 


Lunt Product Number: LS152THa/B1800