Adjust Contrast, Zoom In, Download

Note: use a mouse instead of a trackpad or touchscreen to limit frustration while using Afterglow. 

Click “Next” above to see the step-by-step instructions.

Alternate Format: Video Instructions

Alternate Format: Written Instructions

Adjusting Contrast

  1. Click the eye icon “Display” to adjust the display settings.
  2. Use the “Faint Target”, “Bright Target”, and “Default Preset” to preview contrast settings.
  3. Pick the one that shows the most detail for your image.
  4. Use the tiny arrows in “Saturation Level Percentile*” and “Background Level Percentile*” to adjust the image further. Make the background as black as possible while still seeing lots details.
    • Icon locations.
  5. The first image below is poorly adjusted. The second is well adjusted (but not zoomed in yet).
    • The background is full of static and the planet is a fuzzy blob. The background is clear black, the stripes on Jupiter are visible.

Zooming In

  1. Use the scroll wheel or the +/- magnifying glasses at the bottom to zoom in on your image
  2. Use your mouse to drag and reposition the image
    • Zoom in/out icon location.
  3. The first example below is poorly adjusted, the second is well adjusted.
    • Jupiter is tiny compared to the frame. Jupiter fills the whole frame.
  4. When the image is positioned so it fills the window, go on to the next step.

Download Images

  1. Click the Camera icon on the bottom. (Not the “image” icon)
  2. This will download a .jpg to your computer.
    • Camera icon location.
  3. This is the image you will use in your assignments.

Media Attributions

  • Display Settings
  • Adjusted not background
  • Adjusted background
  • Adjustment Zooms
  • Adjusted not zoomed
  • Adjusted zoomed
  • Camera Icon

License

Skynet and Afterglow User Manual - Astro 100 - Enevoldsen Copyright © by Alice Enevoldsen. All Rights Reserved.

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