Jared makes sense regarding the likelihood that it's optics-related rather than program. I do also occasionally get a perfect parabola from upper left to upper right on the graph. I though it could be drift in the focuser as well, though the Moonlite with the stepper is pretty tight other than a minimal amount of gear play. Not really a concern, more just curious. Doesn't surprise me since I don't get the exact out-of-focus image either side of focus. Probably some optical aberration.
↧