Sleepy TelescopeLunt LS35THa B600
Lunt LS35THa: 35 mm H-alpha solar telescope with a B600 blocking filter, also the second etalon of my double stack.
The Lunt LS35THa is a dedicated H-alpha solar telescope with a 35 mm aperture and an internal etalon with a bandwidth under 0.75 Å, tuned by tilt. Mine was bought second-hand and came with a Lunt B600 blocking filter.
I use it on its own, and its etalon as the second filter of a double stack with the Daystar Quark Chromosphere on the Bresser 127L, with the ASI174MM.
Filaments and an Active Region: April 2026
A monochrome H-alpha mosaic with a winding filament, a sunspot and bright plage.
Twisted Fibrils Around a Spot Group
A monochrome H-alpha view of a sunspot group surrounded by bright plage and twisting fibrils.
Sunspot, Plage and Fibrils in H-alpha
A monochrome H-alpha mosaic of a sunspot with surrounding bright plage and a dense web of fibrils.
Prominence over the Limb: May 2025
A colored H-alpha time-lapse of a prominence rising over the limb, with the chromosphere's granular texture below.
A Serpentine Filament in H-alpha
A colored H-alpha view of a long, S-shaped filament curving across the chromosphere near the limb.
Limb Prominence and Chromospheric Texture
An H-alpha view of the limb, with prominence material above the chromosphere's fine granular texture.
A Prominence Arch with Earth for Scale
A large looping prominence over the limb with distance rings and a to-scale Earth for comparison.
H-alpha Limb Panorama
A wide H-alpha panorama along the solar limb with active regions, plage and filaments.
AR3697 in Motion
An H-alpha time-lapse of active region AR3697, with bright plage, a sunspot group and a long dark filament.
Active Region in H-alpha: May 2024
A colored H-alpha mosaic of a sunspot-rich active region with bright plage and swirling fibrils.
A Prominence Drifting off the Limb
A time-lapse in H-alpha of a wispy prominence standing off the solar limb.