Lunt 60/420 (B600) Universal Day & Night Telescope

⦿ Etalon: Internal <0.65 Angstrom (<0.5 Double Stacked with 50/60FHa)
⦿ Tuning: Internal Pressure Tune (Doppler True Tuning)
⦿ Focal Length: 420
⦿ F Ratio: F/7
⦿ Lens: ED Doublet, FPL51
⦿ B600 Blocking Filter