LUNT LS40THa/B500 H-Alpha Solar Telescope

LUNT LS40THa/B500 H-Alpha Solar Telescope

Solar observation in H-Alpha: prominences, filaments, flares ... the most spectacular way to see the Sun - easy and affordable with the LS40THa.

The LS40THa/B500 is a complete telescope for observing the sun in H-alpha, with 40 mm aperture (no central obstruction) and 400 mm focal length. The H-alpha wavelength is the most impressive way to observe the sun, showing prominences at the sun´s edge, filaments and flares on the surface, and much more. An Etalon with mechanical tilt-tuning provides <0.7 Angstrom bandwidth.

Fine adjustment is achieved with a 1.25 inch helical focuser. Blocking filter is the B500, this is good for visual observation of the sun. The star diagonal in which the blocking filter is installed, is equipped as standard for 1.25 inch eyepiece connection.

The easy handling makes this telescope ideal for starting H-Alpha solar observation. Due to its compact dimensions it is also a good travel telescope for the experienced solar observers.

The LS40THa telescopes are available with choice of B500, B600 or B1200 blocking filters. The larger blocking filters provide less edge obstruction and a larger field of view for visual observation and photography. Please note that these telescopes have only a very small back focus and therefore photography is difficult. We recommend special astro cameras for photography which have a very short distance to the sensor, preferable monochrome models.

Features

Aperture: 40 mm (no central obstruction, 2-lens refractor)

Focal length: 400 mm

Bandwidth: <0.7 angstroms

Tuning: mechanical tilt-tuning

Blocking filter: B500 with 1.25 inch connection

Focuser: helical focuser

Dovetail bar matching standard GP style

1/4-20 tapped base (standard thread for photo tripods)

Sol-Searcher included

Weight: 1.2 kg

Length: 41 cm

Important note: In humid air, blocking filters might tarnish, so keep yours dry. You can get little packages of silica gel for reducing humidity even more. Put one and the filter into a small freezer bag and seal it

{Solar image from a customer}]Our customer Thomas Musall captured a nice image of the sun with a Lunt LS40THa:

Object: Sun in H alpha

Photographer: Thomas Musall
Date: 2022-05-09
Telescope: Lunt LS40THa
Aperture: 40 mm
Focal length: 400 mm
FWHM: <0.7 ångströms
Camera: ZWO ASI294MM Pro

Safety informations: PDF Download