Bahtinov mask question

[Jonny_H]

Hello all,

I have a bahtinov mask on order for my 150PDS as I have been struggling with focus lately when imaging. Currently I have been focusing manually by eye.....or at least trying to 😉

Anyhow....in the fear of this being a silly question - what is the best method for focusing using a bahtinov mask prior to an imaging session? e.g. should you get into focus using an eyepiece first then switch to your AP camera? Or should you focus using your AP camera? Or doesn't it really matter?

Any input and info would be much appreciated.

Clear skies.

Jonny

 

[Stargazer33]

Focus with your camera. The focal length will be slightly different between your ep and your cameras sensor. 

If you haven't got a bahtinov aid in your imaging software you can download the free program Bahtinov Grabber. 

[Jonny_H]

17 minutes ago, Stargazer33 said:

Focus with your camera. The focal length will be slightly different between your ep and your cameras sensor. 

If you haven't got a bahtinov aid in your imaging software you can download the free program Bahtinov Grabber. 

Thanks for this. I will take a look at that.

I am currently using an ASIAIR pro and I'm not aware that it has a bahtinov aid albeit it does allow for an EAF (which i don't have at present).