> Milky Way in different filters

  • Posted on: 1 June 2020
  • By: tihomiry

This is a comparison of my not modified Pentax k5 DSLR and the same, but modified one without IR-cut filter.
Removing the IR-cut filter not only increase sensitivity by 1-2 stops, but also slightly increase the resolution as the IR light (despite not being that much detailed) pass trough the byer RGB mask without filtering.
Below we can see a shot with UHC-s filter as well, witch give us best contrast and brightness of the H-alpha objects as Lagoon nebula (M8). Thus it needs the longest exposure 120s against 60-90s for the other filters. You can see the beautiful Galactic horse dark nebula on the shots :)

Milky way in Sagittarius in different filters

Most of the modern LED backlight screens including Laptops, TV and smart phones use PAM technique for Pulse-amplitude modulation. This means that they switch on and off state very rapidly.

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