The zoom tool in Camera Raw 13.1 only seems to toggle between 2 zoom settings. Not sure why the tool would differ from Photoshop. The "scubby" zoom doesn't seem to work as described in J Kost's blog. I see there's an option in Prefs to set zoom as per LR, but I would simply prefer the Zoom controls to be consitant with PS, as I have used that for alomost 30yrs. When inspecting details it's helpful to have different zoom options, as in PS.