50mm, 4mm blocking filter, Pressure tuning

50mm, 4mm blocking filter, Pressure tuning


  • Type: Single Interference Etalon
  • Tuning: Internal Pressure Tuner (Doppler True Tuning)
  • Aperture: 50mm
  • Focal Length: 350mm
  • Focal Ratio: f/7
  • Bandpass: <0.75 Angstroms @ 656 nm
  • Focuser: Helical Focuser
  • Mounting: Integrated clamshell style with 1/4-20 tapped base
  • Color: Pearl White with Black and Red accents
  • Diagonal: B400 Blocking Filter (standard)


       The LS50T is a refractor-based system with a 50mm aperture and an internal-mounted etalon with Pressure Tuner adjustment. This system allows for a <0.75 Angstrom band pass.

  • Aperture- 50mm
  • Emission line- H-alpha
  • Blocking or ERF Aperture- 4mm
  • Bandwidth- <0.75 Angstroms @ 656nm
  • Telescope Focal Length- 350mm
  • Focal ratio- f/7
  • Included tuner