Actual Step

Manual Focus Main Camera on ASIAIR Pro

updated: 2023-07-01

Purpose

Finding the correct focuser setting for best images

Previous Step

Next Step

The entire tutorial is available from ZWO Optical: How to use manual manual focusing with EAF

Required Equipment

Telescope

any

Reducer

any

Filter or Mask

Bhatinov Mask (recommended!)

Camera

ZWO ASI294

Focuser

ZWO EAF

Session Control

ASIAIR App

Procedure:

  1. Activate the focus panel with Focuser icon on the left side menu bar:


  2. Open the focus settings on the right side bar and you will see this:


  3. Use the focus controls to focus and fine tune on a star:
     or

  4. Place the green rectangle on the selected star and press the Zoom function


  5. This brings up the fine tune panel and will display FHD, brightness and FWHM graphs (missing in this screenshot) 


  1. Now fine tune the focus until you get a good focus position.


  1. Focus achieved - success (simulated picture!)


  2. Additionally you can also use a Bhatinov mask to improve the focus:

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