There is a new version of SKW 5.9 available now, featuring new options for astigmatism-balanced and sensor tilt in the collimator tool. However, their help documentation is not yet updated.
To update to the new version SKW, you MUST FIRST uninstall the current version using the Windows OS uninstall tool.
The first time you run the new SKW version, it should automatically find your license key. If not, you can provide the license key file.
DO NOT register a new license since this will render your model unusable.
If you use the same working directory folder, all your settings and models will be automatically recovered.
In order to use these new features, you need several defocused stars in the image. For optimal results in correcting astigmatism and tilt, I recommend having 20 to 30 stars scattered across the field.
There is a star distribution quality flag that should ideally be green. It automatically assesses how well the stars are spread across the field and how many are usable for the calculation. Below the first viewport is the raw image, the second is the astigmatism-balanced collimator tool viewport, and the last one (bottom) is the tilt tool.
They all provide similar collimation tool aspects already in SKW, with the same user interface and a target.
The astigmatism-balanced tool shows a rotating blue cursor at the location where there is the maximum departure of the absolute total astigmatism from the center of the field. You want to bring the % balance (which replaces the score value) as close to zero as possible, at least into the green zone.
The tilt tool does the same kind of thing. The blue cursor is located where there is a maximum of positive tilt. The deviation shown at the bottom (replacing the score value) is related to the scope CFZ. You want to be below 100%, also in the green zone.
