The "GetMaxDigitalMag" command to get the digital magnification gives a response of 0x or 1x. this is the optical magnification. You will see this on the Spectra HD line because the cameras have optical magnification and not digital.
Pelco Cameras, Pelco Video Management
Any camera that does not support digital magnification, but has optical magnification type
This is due to the response giving a value but not having a way to give the correct value because the magnification is not true digital
Engineering is looking at resolving in a future release