Ashwater – Celestial Sky Overlay© - Western Sky

These controls adjust the astronomical overlay projection. The horizontal and vertical edge-squeeze controls each have an adjustable protected centre width or height; both default to 50%. The shared edge-correction curve controls how the existing lens-distortion and edge-squeeze corrections are distributed from the protected centre towards the image edges. A value of 1.0 is the standard curve. Lower values make the change more gradual and concentrated towards the outer edge; higher values make the correction build sooner as you move out from the centre. This changes the distribution only, not the strength set by the three independent correction sliders. The radial calculation is normalised separately by image width and height, so it follows the actual image proportions, including a 16:9 frame. Camera: Tapo C325WB V2. Published starting field of view: approximately 106° horizontal and 56° vertical. Actual image framing may differ because of camera processing, cropping and lens correction. Star positions are calculated from the selected location and time in the basic settings.