Using a smartphone with a spotting scope

[Jonathan Cross]

Now that LR has super resolution and denoise has anyone tried using a mobile phone with a spotting scope to photograph wildlife?  It seems there are adaptors available. Linked to this, how does one look up or calculate the depth of field of a spotting scope?  For instance would all the head of a deer with antlers be in focus?  My gut feeling is that the dof will be tiny.

Thanks,

Jonathan