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Ls100Tha Without Blocking Filter View larger

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Ls100Tha Without Blocking Filter

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Ls100Tha Without Blocking Filter



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5 290,00 €

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The LS100THa and 'H-alpha solar telescope a full 100mm in diameter (no obstruction!) And 800mm focal length. An internal Etalon with the air-pressure tuning system allows to have a bandwidth of less than 0.7A. This Pressure Tuner allows better adjustment than other systems. Pressure Tuner system adapted the Etalon to the change in altitude and atmospheric pressure for optimum optical performance ever.

The blocking filter is not 'present in this model. Recall that a solar telescope must be coupled to a blocking filter should be, which can thus be bought separately.

The system can 'be improved with a second filter 100mm for the Double Stack which reduces the bandwidth to less than 0.5A.


  • Diameter: 100 mm
  • Length Focal length: 800 mm
  • Bandwidth: <0.7 Angstrom
  • Tuning: air-pressure tuning system
  • Filter lock: not present < li> Focuser: Starlight Instruments Feather Touch with reduction 10: 1
  • Weight: 6.6 kg
  • Length: 62 cm


    These telescopes with their 100mm aperture and 800mm focal length offer with their internal Etalon filter bandwidth below 0.7 Angstrom. Advanced accessories such as Feather Touch focuser, seeker of TeleVue Sol Searcher and new air-pressure tuning system are provided as standard equipment. Also included are the support rings and a rigid suitcase transport. The LS100THa is available with filters blocking B1200, B1800 and B3400: recommend the last (not provided in a diagonal as others but in straight version with extension tube 50.8 mm) for those who want to shoot with a large sensor .

    LS100THa with Pressure Tuner

    These telescopes are now also available with the new air-pressure tuning system. This allows a better regolazioene dell'Etalon compared to other systems by reducing the bandwidth to values ​​lower than 0.7 A.

    The atmospheric pressure varies depending on whether you are, for example, at sea level or in the mountains. Unfortunately the filters Etalon respond to these changes and the wavelength that is allowed to pass from the filter varies as a function of atmospheric pressure. This variation is very small but at bandwidths of less than 1 Angstrom is clearly visible. If the filter is not perfectly tuned to hear the H-alpha wavelength, the image loses detail and other features like bumps or granules are no longer visible.

    To make this adjustment proceed usually mechanically but to sizes of a few Angstrom this is very difficult to obtain. The new system Pressure Tuner Lunt Solar Systems works differently: the air pressure in the filter is adjusted to 100% to the external pressure. Then the air around all'Etalon can be compressed or expanded by the tuning system to change the pressure between the surfaces. This allows the surface dell'Etalon to always remain at the same angle with respect to light waves but changing the refractive index of the air in the camera: it gets so an effect of tuning of + or - 0.4 Angstrom. The patented Pressure Tuner of Lunt Solar Systems is also called True Doppler Tuning and achieves much better results than conventional tuning mechanisms.

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