The developer of the “
Bahtinov Grabber” application (Niels Noordhoek) has now added an auto focus routine to his (free) software!
The Bahtinov Grabber application overlays a 3 line grid on top of the close-to-focus diffraction spikes and produces a directional indicator (+ or -) and a numerical read out of focus accuracy to assist with finding optimum focus.
Link to post on CN.
Cheers
Dennis