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      T-18

      TEC160FL Apochromatic Refractor with Baader full aperture ERF

      Daystar Chromosphere Quark in series with Lunt tilt Ha etalon

      Telescope Owner
      Mark Johnston
      • Model
        ............................................................................................................................
        TEC160FL
      • F-Ratio
        ............................................................................................................................
        F30.1
      • Aperture
        ............................................................................................................................
        16 cm
      • Location
        ............................................................................................................................
        United States of America
      • Camera
        ............................................................................................................................
        Player One Apollo-M IMX174M with cooler
      • Bortle scale
        ............................................................................................................................
        5
      • Focal Length
        ............................................................................................................................
        481.6 cm

      Datasets made by telescope

      View all
      Mark Johnston
      12 credits

      Active prominence transition (5 images)

      H
      9m
      • Telescope
        ............................................................................................................................
        T-18
      • Field of View
        ............................................................................................................................
        8.1 x 5.07 arcmin
      • Location
        ............................................................................................................................
        United States of America
      • Transient Event
        ............................................................................................................................
        Yes
      Mark Johnston
      4 credits

      Hummingbird shaped prominence March 24 2025

      H
      30m
      • Telescope
        ............................................................................................................................
        T-18
      • Field of View
        ............................................................................................................................
        8.1 x 5.07 arcmin
      • Location
        ............................................................................................................................
        United States of America
      • Transient Event
        ............................................................................................................................
        Yes
      Mark Johnston
      5 credits

      Spectacular prominence in both single and double stack to show the difference

      H
      30m
      • Telescope
        ............................................................................................................................
        T-18
      • Field of View
        ............................................................................................................................
        8.1 x 5.07 arcmin
      • Location
        ............................................................................................................................
        United States of America
      • Transient Event
        ............................................................................................................................
        Yes
      Mark Johnston
      5 credits

      Striking prominence Aug 18 2025

      H
      30m
      • Telescope
        ............................................................................................................................
        T-18
      • Field of View
        ............................................................................................................................
        8.1 x 5.07 arcmin
      • Location
        ............................................................................................................................
        United States of America
      • Transient Event
        ............................................................................................................................
        Yes

      T-18