Lunt 60mm H-Alpha Double Stack Filter (Front Mount)

Introducing the Lunt LS60FHa, a 60mm H-Alpha Double Stack Filter (Front Mount), features a 60mm aperture with no central obstacle. 

This 60mm Double Stack Filter combines a tuned etalon designed for use with a customer-supplied refractor. 

With a B600 blocking filter, it delivers full disk images on telescopes with up to 540mm focal length.

Options for larger blocking filters are available for telescopes with longer focal lengths.

Select the appropriate filter/blocking filter package based on your telescope and focuser size:

• B600 - Up to 540 mm focal length, offered in 1.25″ or 2″ diagonal  

• B1200 - Up to 1080 mm focal length, offered in 1.25″ or 2″ diagonal

• B1800 - Up to 1620 mm focal length, offered in 1.25″ or 2″ diagonal 

• B3400 - Up to 3060 mm focal length, offered in 2″ straight-through tube

This Hydrogen-alpha filter is designed for day use on a customer-supplied telescope (adapters required) and can be easily removed for night observing.

With an estimated bandpass of <0.70 Angstrom, the LS60FHa H-Alpha Filter provides high-contrast views of surface and edge details.

Double-stacking via an additional etalon system can further reduce the bandpass to ~<0.50 (dependent on scope), enabling higher-resolution viewing and imaging.

The LS60FHa H-Alpha Filter without a blocking filter is available for those with a Lunt blocking filter.

It is essential to use a Lunt blocking filter with Lunt Ha filters at all times.

Necessary Accessories: Generally, an adapter plate is needed to affix a Lunt Solar Filter to the front of a customer-supplied telescope.

Adapter plates for common user scopes are readily available, and custom options can be considered as needed.

No adapter is necessary for linking one LS60FHa to another for double-stacking or connecting an LS60FHa to a Lunt 60mm Telescope.

Features:

• 60mm Optical Aperture: The Lunt 60mm H-Alpha Double Stack Filter (Front Mount) features a generous 60mm optical aperture with no central obstruction, ensuring unobstructed and clear views of solar phenomena.

• Adaptable Design: Specifically designed for retrofitting (adapters required) onto a customer-supplied telescope, this Hydrogen-alpha filter allows day use and can be easily removed, allowing the telescope to resume night observing.

• Versatile Bandpass: With an estimated bandpass of <0.70 Angstrom, the LS60FHa filter facilitates high-contrast views of both solar surface and edge details.

• Double-Stacking Capability: The filter allows for the addition of an extra etalon system, enabling double-stacking. This process reduces the bandpass to approximately <0.50 Angstrom (dependent upon the telescope's specifications), enhancing resolution for both visual observation and imaging.

• Options for Blocking Filters: The LS60FHa H-Alpha Filter is available without a blocking filter, catering to users who already possess a Lunt blocking filter or those aiming for specific purposes. It is essential to use a Lunt blocking filter with Lunt Ha filters at all times.

• Day and Night Adaptability: Designed for day use, the filter seamlessly transitions for night observing, providing flexibility in solar and celestial observations.

• Adapter Plate Compatibility: Typically, an adapter plate is required to attach the Lunt Solar Filter to the front of a customer-supplied telescope. These adapter plates are readily available for common user scopes, with potential for custom-made options to meet specific requirements.

• Connectivity Ease: No adapter is needed to connect one LS60FHa to another for double-stacking or to connect an LS60FHa to a Lunt 60mm Telescope, streamlining the setup process.

What's Included:

✓ Lunt 60mm H-Alpha Double Stack Filter (Front Mount)

✓ Aluminum Hard Case

✓ Instructional Manual

✓ Lunt 5 Year Warranty

Specifications:

• Optical Aperture: 60 mm

• Etalon: Internal <0.70 Angstrom

• Tuning: Tilt

• Focal Length: Customer Telescope

• Storage: Aluminum finished hard case with fitted foam

• Weight: 3 lb. (~1.5 kg)