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BAA Images Alun Halsey

Observation by Alun Halsey: Sun from 22nd April

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Alun Halsey


Alun Halsey


2021 Apr 22 - 12:14


2021 Apr 23 - 14:18


The Sun

  • 150 f/10 with PST etalon
  • 150 f/8 with Lunt pressure tune module
  • QHY5III 178
  • 72ED doublet
  • Solarmax 40/BF10 filter set and Lunt CaK B1200 module
  • CEM60

Berkshire UK

Target name



Sun from 22nd April

About this image

Comparing two 150mm Ha modified scopes,one with a PST etalon the other with Lunt pressure tune etalon module off a 50THa. The full disk images taken using the 72ED and SM40/BF10 filter set and Lunt CaK module. SER's stacked in Autostakkert 3 and processed in Astrosurface and PS CS2.

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