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)