EAF Electronic Automatic Focuser is the latest innovation from the engineers at ZWO. We believe that it will greatly help with astrophotography. It not only supports various computer software in the market, with the cooperation of ASIAIR, it also enables precise and wireless focus control through the phone for planetary and deep-sky imaging.

Here is a simple guide about how to do that.

 

Step one:

Mount ASIAIR and EAF onto the telescope.

ZWO_EAF

 

Step two:

Connect them with cables.

Connect ASIAIR first, then use a USB cable to connect EAF with ASIAIR. Don’t forget with the 12V power supply.

EAF-connection

 

Step three:

Choose “Focuser Settings” in ASIAIR application and set the parameters. Set “Current Position” to 0, “Fine” to 10, and “Coarse” to 300.

Focuser_setting_ASIAIR

You are free to experience wireless focus now. Press “Fine” or “Coarse”button along the left side of the screen to get precise focus control, and note the changes of the star in the preview box during this progress.

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At last, let’s check how it will be like when you have mounted both ASIAIR and EAF.

EFW_wireless_focus

You can photograph deep space at home, in your tent, in your car, or in anywhere as long as you can receive the wifi signal of ASIAIR! With ASIAIR and EAF, astrophotography is so easy!

26 Responses to How To Do Wirless Focus Control With EAF And ASIAIR?
  1. Avatar

    Any news on the autofocus feature being added in next release? Could the exposure time for focus be extended please? 10 seconds is not enough for narrowband filters. Thank you.




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      Our devs are working hard to develop the autofocus, and it will be released in the near future.
      Also we will convey your feedback to our devs, and they will consider this.




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  2. Avatar

    Just received a new ASIAir Pro. I have the same problem as the one described below – fine and coarse settings in the iOS app have no effect. The focuser moves at the same speed whether I press > or >>. It is not the coupling because fine focus works as it should if I use the hand controller.




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      You could post your problem on our forum with the picture to show how you set the fine and coarse settings. So that we can have a good look at this. Thank you.




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    I received my ASIAir Pro a couple weeks ago. I have the same problem as joegeiger above – it doesn’t matter what you enter in the fine and coarse settings. The focuser moves at the same speed (coarse) whether you press > or >>. I’ll add that fine control works as it should with the hand controller, meaning it is not a coupling issue (which are very tight). Any ideas?




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      You could post your problem on our forum with the picture to show how you set the fine and coarse settings. So that we can have a good look at this. Thank you.




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    It is very difficult to get sharp images with Asiair and EAF. I am using a Bahtinov mask, but still it is clumsy. The responsiveness of the system (iPad control) is underwhelming. As long as there is no autocus routine available EAF is useless, so I went back to manual focuser control.
    I don’t understand, why Zwo is not able to present a autofocus routine in Asiair pro until now. The mathematical principles are clear and programming should not be too difficult. I am really disappointed, because the promise of autocus was a main appointment for buying two EAFs.




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      We are so sorry to this, but our devs are working hard to develop the autofocus and test it. Please wait for a while kindly. Thank you very much.




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    Why is it that you have an EAF adapter for SCT’s with the Feathertouch focuser, but don’t have one for the standard focus knob? The RASA 8 doesn’t have the Feathertouch. It has a standard knob.




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    Hello! It’s really useless EAF for autofocusing in ASIAIR?
    It’s is main featur of this tool and is still not working?




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    I don’t see a difference in speed between fine and coarse when using the focus controls in ASIair. I set the fine steps to 10 and the coarse steps to 300 but the drive doesn’t turn any faster if I press the coarse button. I tried a coarse speed of 500 and 1000 and it still made no difference. Any suggestions on how to get this working properly? Thanks.




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    An adapter for GSO RCs would be nice. I got it to work for myself but it is no simple task for average people.




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      Thank you for supporting us.I will convey your feedback to our devs and they will consider this.And you can send an email to support to tell us how you connect.




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    How do automatic focusers work for SCTs? ZWO solution or is the Celestron auto focuser in the ASIAir list?




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      We have EAF focuser adapter for Celestron SCT feather touch, you can find it here.
      EAF
      Sorry to tell you ASIAIR does not support the third party focuser now.




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