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How to Auto Focus in AstrophotographyUpdated 4 months ago

Why are the stars I shoot always blurry while others' stars shot with DWARF II so clearly? The Astro autofocus feature is released, this article will help you understand how to take clear pictures of stars.

1. Attention

The logic of Astro autofocus is as follows:

  1. Find a naked-eye-visible bright star.
  2. Roughly align the DWARF II lens with the bright star.
  3. Find the bright star on the telephoto screen in the DWARFLAB app.
  4. Use the astronomical auto-focus function.
  5. After completing the auto-focus, proceed with astronomical photography.


  • Please find the brightest star visible to the naked eye to complete the Astro autofocus. We define a bright star as a star that can be clearly seen by a wide-angle camera at the highest exposure (1s) and the highest gain (164). Autofocus may fail if the star is too bright or too dim, so we recommend choosing a star instead of a planet.
  • Please upgrade the firmware to version 1.3.23 or above, and the DWARFLAB app version needs to be 1.1.0 or above.

2. Use Steps

2.1 Locate the medium bright star visible to your naked eyes in the sky (e.g. Vega or Arcturus, please refrain from focusing on planets like Venus or any other celestial object with magnitudes below 0).

2.2 Point the DWARF II lens towards this bright star.

2.3 Locate the bright star within the frame of the telephoto camera. 

How to locate this bright star in the telephoto camera frame?

Step 1: Adjust the wide-angle camera to the highest exposure (1s) and the highest gain (164).

Step 2: Look for this bright star in the wide-angle camera frame.

Step 3: Move the joystick to move the star into the green box in the wide-angle camera frame. Locate this bright star in the telephoto camera frame.

*The moving speed of DWARF II lenses can be adjusted by setting up the virtual joystick's moving speed.

2.4 Switch to telephoto lens view and Astro mode, tap the 'FOCUS' button and then tap the 'Auto' button to complete the astronomical autofocus.

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