Lunt Internal Double Stack Module (Choose Scope Model)

Lunt Internal Double Stack Module Preorder notice: ships 30–60 days after checkout (estimated window) Transform your Lunt scope into a high-definition H-alpha machine—double stacking narrows the bandpass so surface detail truly pops LFPT module (for 130 mm & 152 mm): tightens system bandpass from <0.65 Å to <0.45 Å for crisp filaments, plage, and fine-scale texture SFPT module (for 80 mm & 100 mm Universal Day & Night): narrows from <0.7 Å to <0.5 Å for a dramatic contrast boost across the disk Upgrade anytime: install at purchase or later—no factory return required—so you can start single-stack and add DS when ready Designed as an internal, matched optic: preserves balance, keeps the rig compact, and maintains even field illumination Ideal for serious visual and imaging workflows where micro-contrast and tonal separation reveal hidden structure A cost-effective path to “observatory-grade” views—add the DS module now or later as your needs evolve Specifications Product Type: Internal double stack (DS) module Compatibility: LFPT: Lunt 130 mm and 152 mm H-alpha telescopes SFPT: Lunt 80 mm and 100 mm Universal Day & Night telescopes Resulting Bandpass: LFPT: from <0.65 Å (single) to <0.45 Å (double) SFPT: from <0.7 Å (single) to <0.5 Å (double) Installation: Internal module; user/dealer installable; no factory return Use Cases: Visual high-contrast observing; high-resolution imaging of filaments, mottling, and limb detail Availability: Preorder; estimated shipping 30–60 days after checkout What’s in the Box? Lunt Internal Double Stack Module (select SFPT 80/100 or LFPT 130/152) Basic installation and operating guidance