Hello,
what would be a good value for maxpixelzoom on modern monitors?

Pixels on modern monitors are usually smaller than the human eye can resolve, hence with a maxpixelzoom of 1 small details would be lost on such monitors.
My considerations so far: The limit at which the human eye perceives an edge as sharp is about 2 arcminutes. I assume this as the limit to perceive pixels. To perceive blur, at least two pixels would be needed.
A monitor is seldom viewed from nearer than its height, which is equivalent to a vFoV of 53°. Hence, a maximum of 1590 pixels (vertically) could be resolved and if you accept minimum blur only 795 pixels are needed. A 4k Monitor can have up to 2160 pixels vertically, so maxpixelzoom should be 1.36 for a display at the sharpness limit or 2.72 to show a tiny bit of blur at the nearest usual viewing distance. Further away, it would still look sharp.

Does that sound correct?
Erik Krause

Does krpano use CSS pixels or device pixels for maxpixelzoom?

Quoted from "klaus.krpano"

the maxpixelzoom relates to the device-pixels (the physical resolution).

Only to be clear: F.e. a Sony Xperia 1 has a device resolution of 643 ppi but a CSS resolution of 161 ppi. Would maxpixelzoom=1 limit the zoom in such that the panorama displays with 643 ppi or 161 ppi?

Ok, that agrees with my findings when I zoom the browser, which changes the devicePixelRatio. It looks like krpano is doing everything right.