Lunt 60mm Ha Etalon Filter (LS60FHa)

Lunt 60mm Ha Etalon Filter

The Lunt LS60FHa is a 60 mm aperture (no central obstruction) integrally tuned etalon for use on a customer supplied refractor.

These Hydrogen-alpha filters are designed to retrofit (adapters required) the customer-supplied telescope for use during the day. They are easily removable so that the scope can continue to be used for night observing.

LS60FHa Solar Filter systems requires a front-mounted filter and a rear mounted 2″ or 1.25″ blocking diagonal. Choose the blocking filter that best suits your telescope and your 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

If you lower the Bandpass by adding double stack filters you will raise the resolution and detail. In general we find that people prefer the view through a DS system and find that a DS system is very beneficial to those that want to image.

Because the LS60FHa H-Alpha Filter has an estimated bandpass of <0.70 Angstrom, it is capable of providing high contrast views of both surface and edge detail. Adding an additional etalon system (double-stacking) will reduce the bandpass to ~<0.50 (dependent upon scope) allowing for higher resolution viewing and/or imaging. An LS60FHa H-Alpha Filter without blocking filter is offered for this purpose or for those who already have a Lunt blocking filter. A Lunt blocking filter must be used with Lunt Ha filters at all times.

Required Accessories: Typically an adapter plate will be required to attach a Lunt Solar Filter to the front of a customer-supplied telescope. These adapters are in stock for the more common user scopes, but can be custom made to your specific requirement if needed.  No adapter is needed to connect one LS60FHa to another for double-stacking.