Lunt 300mm H-Alpha Double-Stack Telescope w/ B3400

• Preorder notice: ships ~300 days after checkout (estimated delivery window)

• Massive 300 mm f/7 dedicated H-alpha telescope built for observatory-class resolution and contrast

• Internal unobstructed etalon delivers a <0.65 Å bandpass in single-stack; factory double-stack configuration targets <0.45 Å for ultra-fine surface structure and high-contrast prominences

• B3400 blocking filter included for generous field coverage and imaging headroom with long focal-length setups

• True Doppler pressure tuning with PC-USB computer control (single or dual system options) for precise, repeatable on-band performance and remote operation

• Premium 3.5" FeatherTouch focuser handles heavy imaging trains with absolute precision and zero slop

• Purpose-built for serious imagers and research-grade visual work—from active regions and filaments to limb dynamics and plage detail

• Engineered for stability: pressure-tuned etalons minimize drift and make quick work of fine feature tuning across the disk

Specifications

• Aperture: 300 mm

• Focal Ratio: f/7

• Etalon Bandpass (single): <0.65 Å

• Etalon Bandpass (double): <0.45 Å (double-stack configuration)

• Tuning System: True Doppler pressure tuning, PC-USB computer controlled (single or dual)

• Focuser: 3.5" FeatherTouch

• Blocking Filter: B3400 (included)

• System Type: Dedicated H-alpha solar telescope

• Preorder Lead Time: ~300 days after checkout (estimate)

What’s in the Box?

• Lunt 300 mm f/7 H-alpha Telescope (double-stack etalon configuration)

• B3400 Blocking Filter

• 3.5" FeatherTouch Focuser (pre-installed)

• PC-USB True Doppler Pressure Tuner controller(s) (single or dual, per configuration)

• Basic documentation and setup guidance