Hi Ron,

Half stepping will double the number of steps, so if you are using wave and have focus at 51k steps, this would now be 102k steps if racked in then moved to focus position.
Half stepping has less torque but finer granularity.

For your focus run, I am not an EKOS user but 134 frames seems quite excessive.

I advise playing around with the initial step counts in Ekos, if you find 20 to 40 causes a change then start with 100 or 200.

From your graph it looks like you were chasing seeing turbulence. About what intensity was the chosen star to focus on? I believe Ekos help says mag 3 or 4 star but that is so dependent on aperture, exposure length, camera sensitivity. Given any specific exposure duration, try manually picking a star that has about 50% to 75% full well when close to focus at a given exposure length and for sure not saturated or too dim.

Gene

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