Double-stack filter for LS50THa telescopes. The bandwidth of H-alpha systems can be reduced by so-called "double-stacking". The smaller bandwidth increases the contrast and detail visible on the Sun's Chromosphere and within Prominences.

This filter is designed specifically for the LS50Tha Telescope. Use of it then reduces the bandwidth to <0.55 Angstrom. It has a thread which attaches directly to the front of the LS50 Telescope

Specifications

The LS50 Hydrogen-alpha Double Stack filter system has a clear 50mm aperture (no central obstruction) integrally tuned etalon for use on any refractor telescope. The LS50 has an estimated bandwidth of <0.75 Angstrom and therefore capable of providing high contrast views of both Prominence and Chromosphere detail. When added to a standard 50 or 60mm Lunt Solar scope it will provide a bandpass of <0.5A.

The filter may also be fitted to conventional refractor telescopes to convert them for use as a solar scope. However, Please note that is this application it MUST be used with a blocking filter. The correct kits for conversion which include blocking filters can be found here

The LS50FHa Double Stack can be added to the Lunt 60mm solar scopes or 50mm Filter including blocking filter with no additional adaption as these both use M90 threads. To fit the LS50FHa to the LS50THa Telescope requires the addition of the Lunt Adapter for LS50/60FHa to LS50THa which converts the filters M90 thread to the M80 of the LS50THa

Specifications

Aperture: 50 mm (no central obstruction)

Bandwidth: <0.75 Angstrom

Tuning: Tiltable Etalon

Housing Diameter: 95 mm

Length: 73 mm

Weight: 0.7 kg

Front Thread: M90x1 Female Thread

Rear Thread: M90x1 Male Thread

The LS50 Hydrogen-alpha filter system has a clear 50mm aperture (no central obstruction) integrally tuned etalon for use on any refractor telescope. The LS50 has an estimated bandwidth of <0.75 Angstrom and therefore capable of providing high contrast views of both Prominence and Chromosphere detail.

The system includes a B1200 blocking filter, which is suitable for most telescopes up to 1080mm focal length. Larger blocking filters suitable for longer focal length are also optionally available. Please ask us for details as blocking filter size is affected by the application of the scope i.e. observing or imaging.

The blocking filter is installed in a 90° star diagonal for use with a 2" focuser. This diagonal is equipped with a reception for 1.25" eyepieces and a T2 camera connection. Adding an additionally available Double-Stack etalon filter will reduce the bandwidth to ~<0.55 Angstrom and offer higher contrast views of the Chromosphere.

Specifications

Aperture: 50 mm (no central obstruction)

Bandwidth: <0.75 Angstrom

Tuning: Tiltable Etalon

Housing Diameter: 95 mm

Length: 73 mm

Weight: 0.7 kg

Front Thread: M90x1 Female Thread

Rear Thread: M90x1 Male Thread

Blocking filter: B1200 in diagonal for 2" focuser

Maximum Recommended Focal Length of Telescope: 1080 mm

The LS60 Hydrogen-alpha filter system has a clear 60mm aperture (no central obstruction) integrally tuned etalon for use on any refractor telescope. The LS50 has an estimated bandwidth of <0.75 Angstrom and therefore capable of providing high contrast views of both Prominence and Chromosphere detail.

The system includes a B1200 blocking filter, which is suitable for most telescopes up to 1080mm focal length. Larger blocking filters suitable for longer focal length are also optionally available. Please ask us for details as blocking filter size is affected by the application of the scope i.e. observing or imaging.

The blocking filter is installed in a 90° star diagonal for use with a 2" focuser. This diagonal is equipped with a reception for 1.25" eyepieces and a T2 camera connection. Adding an additionally available Double-Stack etalon filter will reduce the bandwidth to ~<0.55 Angstrom and offer higher contrast views of the Chromosphere.

Specifications

Aperture: 60 mm (no central obstruction)

Bandwidth: <0.75 Angstrom

Tuning: Tiltable Etalon

Housing Diameter: 95 mm

Length: 85 mm

Weight: 0.85kg

Front Thread: M90x1 Female Thread

Rear Thread: M90x1 Male Thread

Blocking filter: B1200 in diagonal for 2" focuser

Maximum Recommended Focal Length of Telescope: 1080 mm

The Lunt Adapter for LS50/60FHa to LS50THa is a specific adapter to allow you to fit the LS50 or LS60FHa front mounted Etalons onto the smaller M80 thread of the LS50THa telescope. Although there is a dedicated double stack filter for the LS50THa, this uses a simple hinge to effect tuning. This moves the etalon away from the optical axis and can also allow dirt to enter. The LS50 / 60FHa is sealed and has a tilt mechanism which keeps the etalon on axis. It is therefore a better front stack although slightly more expensive.

PLEASE CONTACT US FOR DELIVERY TIMES

This Calcium K module will transform your normal astronomical telescope into a Ca-K solar telescope. Simply put the Ca-K module into the 2" focuser of your telescope, and you are ready for solar observing in the light of the Calcium-K wavelength. The module is fitted with the necessary energy rejection filter so nothing else is needed.

Internal narrowband filters allow for a <2.4 Angstrom bandwidth at 393nm. The Ca-K wavelength is at the edge of the visible light spectrum for human eyes, so for many people visual observing is difficult.  Therefore the Ca-K Module is optimized primarily for imaging which will yield the best results. A Calcium-K module like this will allow capture of high contrast surface detail and also prominences.

This module is optimised for telescopes up to 100mm aperture and 540mm focal length.

The Ca-K module is in a straight extension tube, for 2" focuser on the telescope side and with T2 connection and a 1.25" clamp on the camera side.

Results with the filter can be further enhanced by adding the Baader K-Line filter which will have the effect of increasing contrast still further.

PLEASE CONTACT US FOR DELIVERY TIMES

This Calcium K module will transform your normal astronomical telescope into a Ca-K solar telescope. Simply put the Ca-K module into the 2" focuser of your telescope, and you are ready for solar observing in the light of the Calcium-K wavelength. The module is fitted with the necessary energy rejection filter so nothing else is needed.

Internal narrowband filters allow for a <2.4 Angstrom bandwidth at 393nm. The Ca-K wavelength is at the edge of the visible light spectrum for human eyes, so for many people visual observing is difficult.  Therefore the Ca-K Module is optimized primarily for imaging which will yield the best results. A Calcium-K module like this will allow capture of high contrast surface detail and also prominences.

This module is optimised for telescopes up to 100mm aperture and 1080mm focal length.

The Ca-K module is in a straight extension tube, for 2" focuser on the telescope side and with T2 connection and a 1.25" clamp on the camera side.

Results with the filter can be further enhanced by adding the Baader K-Line filter which will have the effect of increasing contrast still further.

This Calcium K module will transform your normal astronomical telescope into a Ca-K solar telescope. Simply put the Ca-K module into the 2" focuser of your telescope, and you are ready for solar observing in the light of the Calcium-K wavelength. The module is fitted with the necessary energy rejection filter so nothing else is needed.

Internal narrowband filters allow for a <2.4 Angstrom bandwidth at 393nm. The Ca-K wavelength is at the edge of the visible light spectrum for human eyes, so for many people visual observing is difficult.  Therefore the Ca-K Module is optimized primarily for imaging which will yield the best results. A Calcium-K module like this will allow capture of high contrast surface detail and also prominences.

This module is optimised for telescopes up to 100mm aperture and 1620mm focal length.

The Ca-K module is in a straight extension tube, for 2" focuser on the telescope side and with T2 connection and a 1.25" clamp on the camera side.

Results with the filter can be further enhanced by adding the Baader K-Line filter which will have the effect of increasing contrast still further.

PLEASE CONTACT US FOR DELIVERY TIMES

This Calcium K module will transform your normal astronomical telescope into a Ca-K solar telescope. Simply put the Ca-K module into the 2" focuser of your telescope, and you are ready for solar observing in the light of the Calcium-K wavelength. The module is fitted with the necessary energy rejection filter so nothing else is needed.

Internal narrowband filters allow for a <2.4 Angstrom bandwidth at 393nm. The Ca-K wavelength is at the edge of the visible light spectrum for human eyes, so for many people visual observing is difficult.  Therefore the Ca-K Module is optimized primarily for imaging which will yield the best results. A Calcium-K module like this will allow capture of high contrast surface detail and also prominences.

This module is optimised for telescopes up to 100mm aperture and 3060mm focal length.

The Ca-K module is in a straight extension tube, for 2" focuser on the telescope side and with 2" and 1.25" clamp on the camera side.

Results with the filter can be further enhanced by adding the Baader K-Line filter which will have the effect of increasing contrast still further.

PLEASE CONTACT US FOR DELIVERY TIMES

This Calcium K module will transform your LS130THa into a high resolution Ca-K solar telescope. Simply replace the standard diagonal / blocking filter with the Ca-K module and you are ready for solar observing in the light of the Calcium-K wavelength. Note this version the LS130 CaK module is only suitable for use with the B1200/B1800 versions of the LS130THa. The B3400 version requires an additional fitting kit.

Internal narrowband filters allow for a <2.4 Angstrom bandwidth at 393nm. The Ca-K wavelength is at the edge of the visible light spectrum for human eyes, so for many people visual observing is difficult.  Therefore the Ca-K Module is optimized primarily for imaging which will yield the best results. A Calcium-K module like this will allow capture of high contrast surface detail and also prominences.

The Ca-K module is a diagonal an supplied with 2" and 1.25" clamp fittings.

Results with the filter can be further enhanced by adding the Baader K-Line filter which will have the effect of increasing contrast still further.